Best 4-Bay NAS for a Home Media Server Under $500

If you want to store hundreds of movies, thousands of photos, music collections, and personal videos in one place, choosing the best 4 bay nas under \$500 for a home media server can help you build a reliable home entertainment system without spending a fortune. A four-bay network-attached storage (NAS) device lets you connect multiple hard drives, access files from different devices, and stream your media across your home network. Unlike a basic external hard drive, a NAS can serve multiple users, run media applications, and keep your files accessible even when your main computer is switched off. The challenge is finding a model that offers the right balance of processing power, storage capacity, software features, and long-term value. Some affordable NAS devices are excellent for backups and direct media playback but struggle with demanding video transcoding. Others provide stronger hardware but require more time to configure. In this guide, we will compare the leading budget-friendly options, explain what matters for Plex and other media apps, and help you choose a system that fits your needs and budget. ## **What Is a 4-Bay NAS, and Why Is It Good for a Home Media Server?** A four-bay NAS is a small computer designed to store and share data over a network. The four bays allow you to install up to four compatible hard drives or solid-state drives, depending on the device and its supported drive types. You manage the system through a web browser or a mobile app instead of connecting a monitor and keyboard like you would with a desktop PC. For a home media server, a NAS can store movies, TV shows, music, family videos, photographs, and computer backups in one central location. Compatible applications can organize that content and make it available to televisions, streaming devices, smartphones, tablets, and computers. Imagine that your household has 500 movies, a large collection of television shows, and several years of family photographs. Rather than keeping those files on different computers and external drives, you can store them on a NAS and access them from compatible devices around the house. ### **Key benefits of a four-bay NAS** * Large storage capacity: Four drives can hold substantially more data than a single-drive enclosure. * Centralized media library: Keep movies, music, photos, and documents in one place. * Multi-device access: Let several household members access files over the network. * Flexible storage protection: Supported RAID configurations can help maintain access after certain drive failures. * Automated backups: Schedule backups for computers, phones, and important documents. * Expandable storage options: Depending on the model, you may be able to replace drives with larger ones as your collection grows. A four-bay system is particularly useful because it gives you more room to balance storage capacity and drive-failure protection. However, four drive bays do not automatically mean that your files are backed up. RAID and backups solve different problems, which we will cover later in this article. ## **What Should You Look for When Buying a Budget NAS?** Not every four-bay NAS is equally suitable for media streaming. A device that performs well as a file server may not offer the processing power needed to convert high-resolution video for a phone or television. Before spending your money, evaluate the following features. ### **1\. Processor performance** The processor affects how well a NAS handles media applications, file indexing, background tasks, and video transcoding. For basic storage and direct playback, even a relatively modest processor may be sufficient. If you want to run a Plex media server, however, processor capabilities become more important when your playback device cannot handle the original video format. Consider these common workloads: * Basic home storage: File sharing, photo storage, and computer backups. * Direct media playback: Sending a compatible video file to a device without changing its format. * Video transcoding: Converting video or audio to a format, resolution, or bitrate that the receiving device can use. * Multiple applications: Running a media server, download tools, file synchronization, and other services together. For example, a television that can play a 4K HEVC video directly may stream it from a modest NAS without much processing. If another device needs the video converted from HEVC to H.264, the NAS may need considerably more processing power. Buying tip: For a Plex-focused NAS, investigate the exact processor, hardware video-encoding capabilities, and software support rather than judging performance by the processor's name or clock speed alone. ### **2\. RAM capacity and upgrade options** Random-access memory (RAM) helps the NAS run its operating system, manage file operations, and support applications. A system with limited memory may be fine for basic storage but less comfortable when running multiple services. | RAM capacity | Typical suitability | | :---- | :---- | | 2GB | Basic file sharing and light storage duties | | 4GB | A reasonable starting point for many home media setups | | 8GB or more | Useful for heavier multitasking and additional applications | These are general guidelines, not strict minimum requirements. The amount of RAM you need depends on the operating system, applications, and number of simultaneous users. Some NAS devices allow memory upgrades, while others use fixed or restricted memory configurations. Check the manufacturer's specifications before buying, especially if you expect your home server to grow beyond basic file storage. ### **3\. Network connectivity: 1GbE versus 2.5GbE** Your NAS network connection affects how quickly large files can move between the server and your devices. 1GbE Ethernet ## **Up to 125 MB/s theoretical** Suitable for many households, regular HD streaming, and common file-sharing tasks. 2.5GbE Ethernet ## **Up to 312.5 MB/s theoretical** Offers more bandwidth for large file transfers and suitable multi-device workloads when the rest of the network supports it. These figures are theoretical maximums based on network bit rates. Actual file-transfer speeds are lower because of protocol overhead, drive performance, and other limitations. For ordinary video streaming, a 1GbE connection is often sufficient. A high-bitrate 4K remux, for example, may use a small fraction of a gigabit connection's theoretical capacity, although peak bitrate and other simultaneous traffic matter. If you frequently transfer large video projects or maintain a large media collection, 2.5GbE can save time. You will also need a compatible router, switch, or network adapter to benefit from the faster connection. ### **4\. Four drive bays and usable storage capacity** The main advantage of a four-bay NAS is the ability to combine several drives into one storage pool. For example, four 8TB drives provide 32TB of raw capacity before formatting and any storage-protection overhead. That does not mean you will have 32TB available for files. | Drive configuration | Raw capacity | Approximate usable capacity | | :---- | :---- | :---- | | 4 × 4TB, no redundancy | 16TB | Up to 16TB | | 4 × 8TB, RAID 5 | 32TB | About 24TB | | 4 × 8TB, RAID 6 | 32TB | About 16TB | | 4 × 12TB, RAID 5 | 48TB | About 36TB | These estimates use decimal drive capacities and exclude formatting, filesystem overhead, and reserved system space. Actual usable capacity depends on the RAID implementation and filesystem. RAID 5 typically provides the equivalent of one drive's capacity for parity, while RAID 6 uses the equivalent of two drives. RAID 5 can generally tolerate one drive failure; RAID 6 can generally tolerate two simultaneous drive failures within the array. A no-redundancy configuration may offer more space, but a single drive failure can result in data loss. For a valuable movie library, personal photographs, or creative projects, storage protection and a separate backup plan are worth considering. ### **5\. Drive compatibility and hard drive type** A NAS enclosure usually does not include the hard drives needed to store your files. You must purchase compatible drives separately unless you find a bundle that includes them. For a home media server, consider NAS-rated hard drives designed for continuous operation and multi-drive systems. Popular options include the WD Red Plus and Seagate IronWolf product families. Check the manufacturer's compatibility list before purchasing, particularly if you intend to use a newer, high-capacity drive. Useful drive-selection tips: * Prefer CMR recording technology for many RAID-based NAS workloads. * Check the supported drive capacities and drive compatibility list. * Compare warranty terms, workload ratings, and noise levels. * Avoid buying four drives without first calculating your total budget. * Consider SSDs only when their price and performance benefits make sense for your workload. For most home media libraries, hard drives provide much better capacity per dollar than SSDs. SSDs can improve certain workloads, but they are rarely necessary just to stream movies. ## **Best Four-Bay NAS Models to Consider Under \$500** The following models offer different advantages. The most suitable choice depends on whether you value easy management, stronger hardware, or network performance. Prices and availability can change. The comparisons below concern the NAS enclosure, not a complete system with four drives. ### **1\. TerraMaster F4-424** Best hardware value Manufacturer-listed price: approximately \$500 The F4-424 is an attractive option for buyers who want more processing power and networking flexibility than many entry-level NAS devices offer. Its Intel N95 processor, 8GB of DDR5 memory, dual 2.5GbE ports, and two M.2 NVMe slots make it suitable for a range of storage and home-server workloads. Memory is upgradeable to 32GB according to the manufacturer's product listing. **Best for:** Buyers interested in Plex, faster local file transfers, and running additional applications. Watch out for: The enclosure can consume almost the entire \$500 budget at its listed price. Look for a legitimate discount if you also need drives. **Product link:** [TerraMaster F4-424 official store](https://www.terra-master.com/products/f4-424-nas) ### **2\. Synology DiskStation DS423** Check current retailer pricing before buying The DS423 is a good option for people who want to manage files, photos, backups, and shared folders through Synology's software ecosystem. It has four SATA drive bays, 2GB of non-ECC DDR4 memory, and two 1GbE ports. Its main strength is its storage and backup experience rather than demanding video conversion. If you mainly want to organize movies and play compatible files on a smart TV, it may fit your needs. If you expect frequent Plex transcoding, study the processor limitations first. **Best for:** Home users who value file management, backups, and a straightforward interface. **Product link:** [Synology DS423 official specifications](https://www.synology.com/en-us/products/DS423) ### **3\. QNAP TS-433** Compare current US pricing The TS-433 includes an ARM-based quad-core processor, 4GB of non-upgradeable memory, four SATA drive bays, one 1GbE port, and one 2.5GbE port. It also supports hardware-accelerated transcoding in its specifications, although Plex compatibility and the precise transcoding workload must be checked separately. QNAP's software provides a broad set of storage and multimedia tools, making the model worth considering for a mixed-use home server. However, the ARM processor means you should not assume that every Plex transcoding scenario will work. **Best for:** Buyers who want a compact storage server with faster-than-gigabit connectivity. **Product link:** [QNAP TS-433 official specifications](https://www.qnap.com/en-us/product/ts-433/specs/software) ### **Which one should you shortlist?** | Your main requirement | Model to investigate | | :---- | :---- | | Strong hardware and 2.5GbE networking | TerraMaster F4-424 | | File management and backup software | Synology DS423 | | Mixed storage workloads and 2.5GbE connectivity | QNAP TS-433 | These are preliminary recommendations, not a claim that one NAS wins every benchmark. Software preferences, the applications you plan to run, current prices, and your media playback devices should all influence the final choice. ## **One Important Decision Before You Buy** Before selecting a NAS for Plex, answer one question: Will your devices play your media files directly, or will the server need to transcode them? Direct Play sends compatible media to a playback device without converting the video. Transcoding converts media when the receiving device cannot handle the original format, resolution, bitrate, or subtitles. Plex explains that transcoding can place a heavy load on the processor, and hardware-accelerated transcoding requires an active Plex Pass subscription for the server owner. For example, if your television supports the video codec, audio format, and subtitles in your movie files, even a relatively modest NAS may provide a smooth experience. If you frequently stream 4K movies remotely or need to convert video for multiple devices, your hardware requirements can be very different. That distinction is central to choosing the right NAS, and it is where the models' practical differences become much clearer. ## **Detailed Reviews: Which Four-Bay NAS Offers the Best Value?** Choosing a four-bay NAS is not just about comparing processor names or counting network ports. The better purchase is the one that can handle your media library, run the applications you need, protect important files, and remain affordable after you add storage drives. For most households, there are three practical priorities: reliable storage, smooth media playback, and manageable running costs. The following reviews look at how the leading options fit those needs, including the compromises you should understand before spending your money. ### **1\. TerraMaster F4-424: Best for Hardware Flexibility** The TerraMaster F4-424 is worth considering if you want a four-bay NAS that can do more than store files. Its Intel N95 processor, 8GB of DDR5 memory, dual 2.5GbE ports, and M.2 NVMe slots give it a useful hardware foundation for a home media server. Memory expansion also provides flexibility if you eventually run several applications together. Why it stands out * Four drive bays for a large media library. * Dual 2.5GbE network ports for faster supported transfers. * NVMe slots for compatible SSD-based storage or caching features. * An Intel processor that makes it a more interesting candidate for certain media workloads than basic ARM-based systems. * Expandable memory for users who expect to run additional services. However, the presence of an Intel processor does not guarantee that every video can be transcoded smoothly. Hardware acceleration depends on the specific video codec, software, operating-system support, and application configuration. Check these details before buying if transcoding is central to your setup. Real-world example: Imagine that you store 4K movies, family videos, and several years of photographs on your NAS. Your television plays most movies directly, while computers regularly transfer large video files. The F4-424's faster network ports can help with those file transfers, provided your computers and network equipment support 2.5GbE. The biggest drawback is the total cost. If the enclosure costs close to \$500, adding four hard drives can push the complete system well beyond your budget. Verdict: A strong candidate for buyers who prioritize hardware flexibility and faster networking, especially when the enclosure is available at a good discount. ### **2\. Synology DS423: Best for Home Storage and Backups** Synology has built its reputation around storage management, backup tools, and a consistent software experience. The DS423 is designed for users who want a central place for files, photographs, documents, and media without having to build a server from individual computer components. Its four SATA bays provide room for a substantial collection, while Synology's DiskStation Manager operating system offers tools for shared folders, user accounts, storage management, and supported applications. What makes it useful? * A straightforward web-based management interface. * File-sharing and backup tools for household computers. * Support for supported storage configurations and drive-failure protection. * Apps for managing and accessing personal files. * A compact enclosure designed for continuous home use. The important limitation is its processing hardware. The DS423 uses a Realtek RTD1619B processor and 2GB of non-ECC DDR4 memory. That makes it more suitable for storage-focused tasks than for demanding, general-purpose video transcoding. Real-world example: Suppose you mainly want to keep movies in a shared folder, stream compatible files to a television, automatically back up your laptop, and organize family photos. The DS423 can be a sensible option because those tasks do not necessarily require powerful video-encoding hardware. Plex compatibility still needs careful checking. A NAS that can host the Plex application may not be able to handle every transcoding workload. For this model, plan around Direct Play where possible rather than buying it specifically for heavy 4K transcoding. Verdict: A strong choice for people who value dependable storage management and backups more than processor-intensive media applications. Official product details: [Synology DS423](https://www.synology.com/en-us/products/DS423). ### **3\. QNAP TS-433: Best for Mixed Storage Workloads** The QNAP TS-433 is another option for people building a home NAS around shared storage, media access, and backups. It uses a quad-core ARM processor, includes 4GB of non-upgradeable memory, and offers both 1GbE and 2.5GbE connectivity. Its combination of storage bays and networking makes it useful for households that regularly move large files across a compatible network. QNAP's software platform includes tools for managing storage, sharing files, and running supported applications. However, buyers should distinguish between an application's availability and its performance under a demanding workload. Main advantages * Four SATA drive bays. * A 2.5GbE port for supported faster transfers. * 4GB of installed memory. * Storage and file-sharing applications. * A compact design suited to a home office or media cabinet. What should you consider before buying? The processor architecture and fixed memory limit how far you can expand the system. Do not assume that support for a media application means the NAS can transcode every 4K video format. Verify the current application compatibility information and test the specific media formats you intend to use. Real-world example: A household with several laptops, a shared movie collection, and regular photo backups may find the TS-433 useful. Its faster network port can improve large file transfers, although your router, switch, client devices, and storage configuration must support the higher speeds. Verdict: Worth considering if you want a four-bay NAS with 2.5GbE connectivity and a broad storage-software platform, but not necessarily the best option for demanding Plex transcoding. Official product details: [QNAP TS-433](https://www.qnap.com/en-us/product/ts-433). ## **Synology NAS vs QNAP NAS vs TerraMaster: Which Is Better?** The three brands approach home storage differently. Your choice should depend on whether you want a simple storage appliance, stronger hardware for media applications, or a balance between the two. **Synology NAS** Best suited to users who want an organized interface, straightforward file management, and backup tools. It is particularly appealing if you want a home storage system that requires relatively little ongoing administration. **QNAP NAS** A good candidate for users who want a broad selection of storage and server applications. The exact capabilities depend on the model, processor architecture, and supported software. **TerraMaster** Worth exploring when hardware specifications and purchase price are major priorities. Check the maturity of the applications you need, available updates, and support documentation before making your decision. There is no universal winner. A well-supported NAS that meets your actual requirements is usually a better purchase than a more powerful system whose software you find difficult to manage. ## **Which NAS Is Best for Plex and 4K Media Streaming?** Plex is a popular way to organize a media collection, download metadata such as movie posters, and stream content to compatible devices. However, the best NAS for Plex depends on how you intend to play your videos. The most important distinction is between Direct Play, Direct Stream, and transcoding. ### **Direct Play: The easiest workload** Direct Play sends the original media file to a compatible playback device without converting its video or audio streams. For example, suppose your NAS contains a 4K HEVC movie with an audio format and subtitles supported by your television. If Plex can send the file unchanged, the NAS generally does not need to perform demanding video encoding. This is why even a budget NAS can work well as a media server when your playback devices support the formats in your library. ### **Direct Stream: Changing the container** Direct Stream is different from video transcoding. Plex may be able to repackage compatible audio and video streams into another container without converting the actual video. This generally requires less processing power than full video transcoding. It can be useful when a playback device supports the video codec but has trouble with the original container format. ### **Transcoding: The demanding workload** Transcoding converts some or all of a media file to meet the playback device's requirements. For example, a 4K video might need to be converted to 1080p for a device with limited bandwidth. A video using an unsupported codec may also require conversion. The processing demand varies with the codec, resolution, frame rate, conversion settings, and whether hardware acceleration is available. | Plex workload | Hardware requirement | | :---- | :---- | | Direct Play of compatible 1080p media | Modest processing capability is often sufficient | | Direct Play of compatible 4K media | Modest processing capability can be sufficient, depending on the rest of the system | | Occasional video transcoding | Verify processor and hardware acceleration support | | Frequent 4K transcoding | Choose hardware specifically suited to the required conversion | | Several simultaneous transcodes | Consider a more powerful platform and test the expected workload | These are general guidelines rather than guaranteed performance ratings. The number of simultaneous streams a NAS can handle depends on the specific files, settings, and clients. My recommendation: If you are building a NAS mainly for Plex, make sure your television, streaming box, or other playback device supports the formats in your library. Improving Direct Play compatibility can reduce the need to purchase a more expensive NAS. For current application requirements, consult the [Plex support documentation](https://support.plex.tv/). ## **HDD vs SSD for a Home Media Server** A common mistake is assuming that installing SSDs will automatically make a media server much faster. For most households, hard drives are the more practical choice for storing large movie libraries. NAS hard drives (HDDs) * Better capacity per dollar. * Suitable for large movie and music libraries. * Available in a wide range of capacities. * Mechanical parts produce some noise and vibration. Solid-state drives (SSDs) * Faster access to many small files. * No mechanical moving parts. * Useful for selected applications and workloads. * Usually more expensive per terabyte than HDDs. For a library of large video files, the main bottleneck is often the network, media processing, or playback device rather than the speed of the hard drive itself. An SSD can be useful for application data, databases, or supported caching features. However, an SSD cache will not necessarily improve sequential movie streaming, and not every NAS supports the same cache configurations. For most buyers working with a \$500 enclosure budget, start with reliable hard drives. Consider SSDs later if you identify a workload that benefits from them. ## **How Much Storage Do You Actually Need?** Your ideal storage capacity depends on the size of your collection and how quickly it grows. A library of compressed streaming-quality movies can require much less space than a collection of high-bitrate Blu-ray remuxes or original video footage. The following examples illustrate how quickly storage requirements can add up. | Media collection | Example size per item | Approximate space required | | :---- | :---- | :---- | | 500 compressed movies | 5GB | 2.5TB | | 500 high-quality movies | 20GB | 10TB | | 100 4K remux movies | 60GB | 6TB | | 1,000 TV episodes | 3GB | 3TB | | Personal photographs | Varies | Depends on collection size | These are illustrative estimates, not universal file sizes. Real files vary widely, and your library may contain overlapping categories. A collection with 500 movies at 20GB each requires approximately 10TB before accounting for television episodes, photographs, and other files. That is one reason four-bay NAS systems are appealing: you can start with a smaller storage configuration and expand as your needs grow, subject to the model's supported upgrade process. Remember that raw capacity is not usable capacity when you configure RAID. Four 8TB drives in RAID 5 provide roughly 24TB before filesystem overhead, while RAID 6 provides roughly 16TB. Your exact available capacity will be lower after formatting and reserved system space. ## **How to Set Up a Four-Bay NAS for Your Home Media Server** Once you have selected your NAS enclosure, the next step is to configure it for reliable storage and convenient media access. You do not need to be a networking expert to get started, but making the right decisions during setup can save time and help prevent data loss later. The following steps apply broadly to Synology, QNAP, TerraMaster, and similar four-bay systems. Menu names and supported features will vary by model. **Step 1: Install compatible hard drives** Install the drives according to the manufacturer's instructions. For a new media server, NAS-rated HDDs are a practical starting point. Check drive compatibility, supported capacity, and whether the model requires a particular tray or mounting method. **Step 2: Connect the NAS to your network** Connect the NAS to your router or network switch using Ethernet. Wired networking is generally preferable to Wi-Fi for a stationary media server because it provides a more consistent connection. **Step 3: Install the operating system** Open the NAS management interface and follow the setup wizard. Install available security updates, create an administrator account, and configure your storage pool and volume. **Step 4: Configure storage protection** Select a supported RAID or storage-pool configuration. RAID 5 or RAID 6 may suit a four-drive media server, depending on your capacity and failure-tolerance needs. Confirm your choices before creating the pool because initial configuration can erase existing data. **Step 5: Create folders and install media applications** Create shared folders for movies, television shows, music, photographs, and backups. Install a compatible media-server application, configure its library locations, and test playback on your television or streaming device. ### **Recommended folder structure** A simple folder layout makes your collection easier to maintain. Media/ ├── Movies/ │ ├── Movie Title (2025)/ │ └── Another Movie (2024)/ ├── TV Shows/ │ └── Series Name/ │ └── Season 01/ ├── Music/ ├── Home Videos/ └── Photos/ Backups/ ├── Laptop/ └── Desktop/ Keeping movie and television files organized with clear names can help media applications identify the correct titles and retrieve artwork and descriptions. Keep personal documents and backups in separate folders with appropriate access permissions. ## **Which RAID Configuration Should You Use?** RAID combines drives into a storage arrangement that can provide more capacity, better performance in some workloads, or protection against certain drive failures. For a four-bay NAS, RAID 5 and RAID 6 are common choices when data availability matters. ### **RAID 5 — A balance of capacity and protection** RAID 5 generally dedicates the equivalent of one drive's capacity to parity. With four 8TB drives, you get approximately 24TB of usable capacity before formatting and system overhead. It can tolerate one drive failure, but another failure during rebuilding may cause the array to become unavailable or result in data loss. ### **RAID 6 — More protection, less usable space** RAID 6 generally dedicates the equivalent of two drives' capacity to parity. Four 8TB drives provide approximately 16TB of usable capacity before overhead. It can tolerate two drive failures in the array, making it an option for people who prefer additional fault tolerance over maximum storage space. ### **RAID 10 — Performance and redundancy** RAID 10 combines mirroring and striping. With four 8TB drives, usable capacity is approximately 16TB. It can tolerate certain drive failures, but the exact failure tolerance depends on which drives fail. For many home media libraries, RAID 5 is a reasonable starting point if maximizing usable capacity is important. RAID 6 may be more attractive if the collection is difficult or expensive to replace and you can accept the lower capacity. However, RAID is not a backup. It does not necessarily protect against accidental deletion, ransomware, theft, fire, or filesystem corruption. Keep an independent backup of important files on another device or in a separate location. ## **How Much Does a Complete Home NAS Cost?** A NAS enclosure under \$500 does not mean a complete media server will cost under \$500. You also need storage drives, and you may want a network switch, backup drive, or uninterruptible power supply (UPS). The following examples are planning estimates for US buyers, not live retailer quotes. | Component | Budget example | Higher-capacity example | | :---- | :---- | :---- | | Four-bay NAS enclosure | \$300 | \$450 | | NAS hard drives | 2 × 8TB at \$160 each | 4 × 8TB at \$160 each | | Ethernet cable | \$10 | \$10 | | Optional UPS | \$80 | \$100 | | Total with optional UPS | \$710 | \$1,200 | The drive prices above are hypothetical budgeting assumptions, not guaranteed current prices. Actual costs vary by brand, capacity, sales, warranty, and retailer. The budget example includes two drives rather than four, so you would need to verify that the selected NAS supports your intended initial configuration and plan how you will expand later. The higher-capacity example includes four drives. ### **Can you build the whole system for under \$500?** Yes, but only under certain conditions. You might find a discounted enclosure, begin with fewer drives, or reuse compatible hard drives you already own. A complete new four-bay NAS with four good-quality drives is unlikely to fit comfortably within a \$500 total budget. If \$500 is your limit for everything, consider these approaches: * Start with a compatible two-drive configuration if your chosen NAS supports it. * Look for a legitimate sale on the enclosure. * Buy fewer drives initially and expand later, after checking the model's migration and expansion rules. * Reuse existing drives only after checking their health and suitability. * Keep a separate backup budget for irreplaceable files. Do not spend the entire budget on the enclosure and then leave no money for data protection. A sensible storage plan is more valuable than having four empty drive bays. ## **Security and Maintenance: Keep Your Media Server Reliable** A NAS is often connected to your home network all day, so security deserves as much attention as storage capacity. A well-configured system can make your files convenient to access, but poor account settings or exposed network services can put your data at risk. ### **1\. Use strong passwords and separate accounts** Create a strong administrator password and use a separate everyday account for media access. If several people in your household use the NAS, give each person only the permissions they need. For example, your children may need access to a shared movie folder but should not have permission to delete computer backups or change storage settings. ### **2\. Keep the operating system and applications updated** Install security updates for the NAS operating system and its applications. Updates can fix security flaws, improve compatibility, and address software problems. Enable update notifications where available, and periodically check the manufacturer's support information to understand how long your model is expected to receive updates. ### **3\. Be careful with remote access** Accessing your home media library while travelling can be convenient, but exposing NAS administration services directly to the internet increases risk. Follow the manufacturer's security guidance, use supported secure remote-access options or a properly configured VPN, and avoid opening unnecessary ports on your router. Enable multifactor authentication if your NAS and chosen services support it. ### **4\. Maintain a separate backup** A useful approach is to keep another copy of important data on an external drive or a separate backup destination. For particularly valuable files, maintain an additional copy off-site. You do not necessarily need to back up every replaceable movie if it can be recreated from a legitimate source. Prioritize family photos, personal videos, work files, documents, and other data that would be difficult to replace. ### **5\. Monitor drive health** Check drive-health reports, review system alerts, and investigate unusual noises or repeated disk errors. Many NAS systems support scheduled S.M.A.R.T. tests and storage-pool health checks. Replace a failing drive according to the manufacturer's instructions and the NAS's documented recovery process. Do not remove a healthy drive at random or assume that RAID rebuilding is risk-free. ## **Common Mistakes to Avoid When Buying a Four-Bay NAS** Even a well-reviewed NAS can disappoint if it does not match your intended workload. These are the mistakes worth avoiding. * Buying for bay count alone: Four bays provide storage flexibility, but they do not guarantee strong media-transcoding performance. * Ignoring processor compatibility: Confirm the specific video formats and hardware-acceleration features you need. * Assuming RAID replaces backups: RAID can improve availability after certain drive failures, but it does not protect against every cause of data loss. * Forgetting drive costs: Calculate the complete purchase cost before choosing an enclosure. * Buying SSDs unnecessarily: HDDs generally provide better value for large media libraries. * Ignoring network limitations: A 2.5GbE NAS cannot deliver its full network advantage if the rest of the connection is limited to 1GbE. * Exposing the NAS carelessly: Secure remote access and administrator accounts before making the server accessible outside your home. * Overlooking noise and placement: Four mechanical drives can make audible noise. Keep the NAS in a ventilated location where its fan and drive sounds will not be disruptive. For additional technical guidance, consult the official documentation from [Synology](https://kb.synology.com/en-us), [QNAP](https://www.qnap.com/en-us/support), and [TerraMaster](https://www.terra-master.com/). ## **Final Buying Checklist** Before purchasing your NAS, use this checklist to make sure the enclosure matches your requirements and budget. ### **Pre-purchase checklist** * Confirm that the enclosure costs less than \$500 at the retailer you choose. * Verify the processor and Plex compatibility for your intended media formats. * Check the maximum supported drive capacity and compatibility list. * Choose an appropriate RAID configuration and calculate usable storage. * Confirm whether RAM is upgradeable and whether the network ports meet your needs. * Add the cost of hard drives, cables, and any required accessories. * Plan a separate backup for important personal data. * Review security updates, remote-access options, warranty, and support. ## **Final Verdict: Which Four-Bay NAS Should You Buy?** The right NAS depends on what you want to do with it. There is no single model that offers the best hardware, software experience, storage flexibility, and price for every household. For buyers who prioritize hardware flexibility, faster networking, and the option to run additional applications, the TerraMaster F4-424 is worth investigating. Its Intel processor, memory expansion, and dual 2.5GbE ports make it an interesting candidate, although its price can consume most of the enclosure budget. For people who primarily need shared storage, automated backups, and a polished management experience, the Synology DS423 deserves consideration. It is particularly appealing for households that want a straightforward way to organize files and access compatible media without building a more complex server. The QNAP TS-433 is another option for mixed storage workloads, especially if you want a 2.5GbE connection. However, its fixed memory and ARM-based processor make it important to confirm application requirements before buying. My final recommendation: Choose the enclosure based on the applications you plan to run, not just the number of drive bays. For a media library that mostly uses Direct Play, reliable storage, compatible playback devices, and a good network connection may matter more than raw processing power. If your main goal is frequent 4K transcoding, investigate the processor and hardware-acceleration support carefully before committing to a model. Finally, remember that the enclosure is only one part of the purchase. Budget for compatible drives, sensible storage protection, and an independent backup. A thoughtfully configured system with enough usable capacity will usually serve a household better than an expensive NAS that leaves no room in the budget for storage. The best home media server is the one that fits your library today, supports your expected growth, and keeps your important files safe over the long term.