NAS or Windows Server for shared video-editing storage?

A common small-office question runs like this: six computers, two of them video editors, and a need for one shared pool of footage and project files. Should that be a NAS appliance or a Windows Server machine sharing folders? Both end up as an SMB file share that editors mount as a drive, so the decision is less about the protocol and more about the network, the disks, who will maintain it, and how it is backed up. The right answer depends on the numbers below, not on brand.

In this guide

Both are SMB file servers

SMB is the network file-sharing protocol Windows uses; with it an application can read, create and update files on a remote server, usually through a mapped drive or a UNC path.¹ Windows Server shares files over SMB, and mainstream NAS systems from Synology and QNAP also expose SMB shares. Clients and servers negotiate the highest SMB dialect they both support; SMB 3.1.1 needs Windows 10 version 1607 or later on the client and Windows Server 2016 or later on the server.¹

That means editing over either one looks the same to the editing software. The differences are:

If your office already runs a Windows domain and has someone who administers Windows, a server fits naturally. If not, a NAS is generally easier to look after. Either can serve the job; the failure cases tend to be network or disk layout, not the platform.

Work out the bandwidth first

Gigabit Ethernet is 1 Gbit/s, so about 125 MB/s at the very best; real transfers are lower once protocol overhead is included. 10 Gigabit Ethernet is ten times that and was first defined in IEEE 802.3ae-2002.² Compare that with the data rate of the footage. Wikipedia lists Apple ProRes target rates for 1920 by 1080 at 29.97 frames per second of roughly 147 Mbit/s for standard ProRes 422, about 330 Mbit/s for ProRes 4444 and about 500 Mbit/s for 4444 XQ.³ Those are per stream, and a timeline with several layers reads several streams at once.

Some simple arithmetic follows from those figures:

• Over a single gigabit link, three or four ProRes 4444 streams would already fill the theoretical limit, and a second editor on the same server shares that link only at the server end.
• Highly compressed camera footage uses far lower rates than ProRes, so one gigabit connection can be enough for light editing of delivery formats.
• 4K, multi-layer or high-bitrate intermediate footage points towards 10 GbE at the server and at each editor's workstation.

A 10 GbE server link alone does not help if each editor is still connected at 1 GbE; the bottleneck is then the editor's own link. On the cabling side, 10GBASE-T over Category 6A reaches the full 100 metres, while Cat 5e or 6 may manage up to about 55 metres depending on installation quality; SFP+ is the most popular socket on 10 GbE equipment.²

SMB Multichannel

Where a 10 GbE switch is too expensive, SMB Multichannel can combine several network connections between a client and a server. QNAP's documentation says its implementation needs QTS 5.1.0 or QuTS hero h5.1.0 or later, SMB 3.0 on both ends, and multiple Ethernet ports of the same speed on each device; with mixed speeds the slowest is used, and it does not support RSS, RDMA or NIC teaming, with gains it describes as 2 to 4 times in its examples.⁴ Windows Server documentation lists Multichannel among the SMB features that applications such as Hyper-V and SQL Server benefit from.¹ Test it with your specific hardware and editing software before relying on it.

RAID: speed and protection are different questions

RAID combines disks for capacity, speed or redundancy. The standard levels:⁵

For video work:

• RAID 0 is fast but a single disk failure destroys the whole pool. Avoid it for shared storage.
• RAID 5 and 6 give the best capacity for large footage libraries, with a write penalty from parity calculations.⁵ With many large disks, a second parity disk (RAID 6) adds a margin during a rebuild.
• RAID 10 costs half the capacity but avoids parity, and is a common choice when write performance matters more than space.
• Synology's own flexible option is Synology Hybrid RAID: SHR needs at least two drives and survives one failure; SHR2 needs at least four and survives two. A reviewer notes the larger the array, the more worthwhile the second parity becomes.⁶

More disks generally mean more throughput, which is why a four-bay NAS and a twelve-bay NAS are not equivalent for several editors. Spinning hard disks in a RAID can deliver sequential speeds that suit video, but random access (many small project files, previews, caches) is where they struggle.

Does an SSD cache help?

Synology's white paper explains that a read-only cache can be built from a single SSD, while a read-write cache needs at least two SSDs of the same type, since data written to the cache is held there before it is flushed to the disks. The cache works at block level, starts empty and needs a warm-up period, and is sized to the working set, not to the whole volume; roughly 400 KB of system memory is needed per 1 GB of cache.⁷

The key point for video: Synology says an SSD cache boosts random small-block access (SMB, iSCSI, virtualisation, mail and file services), but does not help sequential access patterns, and gains are expected to be minimal for workloads such as single-channel HD video streaming.⁷ A cache may therefore help project files, cache folders and thumbnails far more than it helps raw footage streaming. If the editors' raw media is the bottleneck, a larger or faster disk array or an all-SSD volume for current projects will do more than a cache.

Backup is not RAID

RAID protects against drive failure but "cannot replace a backup plan".⁵ It does nothing about accidental deletion, ransomware, fire, theft or a failed controller. The widely used 3-2-1 rule means three copies of the data, on two kinds of media, with one off-site. Applied here: the working copy on the NAS or server, a second copy on a separate device (a second NAS, external disks or a different server), and a third off-site or in the cloud. Finished projects can be archived off the fast storage to keep the working pool small. Both Synology and QNAP provide backup and snapshot tools, and Windows Server has its own backup features; whichever you choose, test a restore, not just the backup job.

A short decision guide

• Light editing, small files, mostly delivery formats: a NAS on 1 GbE is often enough.
• Heavy codecs, 4K or several simultaneous editors: plan for 10 GbE end to end, and enough disks to deliver the throughput.
• Existing Windows domain and in-house Windows skills: a Windows Server share keeps permissions in one place.
• No IT staff: a NAS with vendor support is simpler to run.
• Either way: write down the number of simultaneous streams and their bitrates, then check them against link speed and array throughput before buying.

A small-team acceptance test before committing

Build a test around the workflow rather than a single large file copy. Use a representative project with the real codec, resolution, multicamera angles and effects your team uses. Have both editors play and scrub at the same time while another workstation copies new media to the share. Repeat while the scheduled backup runs. Record dropped frames, time to open a project, transfer speed and whether the share stays responsive.

Separate three questions: whether footage can be read fast enough, whether project files can be managed safely, and whether the editors' application supports the intended collaboration workflow. A shared folder supplies shared storage; it does not itself provide project locking, version control or simultaneous editing rules. Check the application vendor's collaboration documentation before two people open the same project.

What belongs in the purchase brief?

• The number of editors working at once and the formats they actually edit.
• Capacity needed for current jobs, growth and a separate archive.
• Workstation ports, switch ports and existing cabling.
• A restore-time target, not just a backup schedule.
• Who is responsible for updates, failed drives and permission changes.

Should benchmarks be read or write tests?

Both are useful. Reading media, writing rendered output and ingesting a camera card stress different parts of the system. Also test small project files and folder browsing. Keep the test data disposable and verify a backup restore with an expendable project before relying on the system for client work.

Sources and further reading

1. What is SMB File Sharing for Windows and Windows Server?, Microsoft Learn: vendor documentation; SMB usage, dialects and features.
2. 10 Gigabit Ethernet, Wikipedia: standard, cabling and SFP+.
3. Apple ProRes, Wikipedia: target data rates for 1920 by 1080 at 29.97 fps.
4. SMB 3.0 Multichannel, QNAP: vendor documentation; requirements and limitations.
5. Standard RAID levels, Wikipedia: levels, fault tolerance, write penalty and the backup caveat.
6. SHR vs. SHR2, WunderTech: independent blog; SHR minimum drives and fault tolerance.
7. Synology SSD Cache White Paper for DSM 7.1, Synology: vendor documentation; cache types, sizing and workloads.