Build the Right NAS for Plex
Tell us the size of your media library, how quickly it is growing and whether you need 4K hardware transcoding. We will calculate the storage, drives, RAID and NAS hardware that fit your Plex setup.
What do you mainly want your NAS to do?
Choose one primary workload. You can add secondary workloads below.
What this builder works out for a Plex NAS
From your library size, its growth rate and how many streams you run at once, the builder sizes the storage, picks a bay count and RAID level that survives a drive failure, and flags whether you need hardware transcoding. The single most important answer is the transcode question — it decides which NAS chip you buy, and it is the one most Plex buyers get wrong.
If you are unsure how much space you need first, the drive-count calculator works back from a target capacity; the builder then adds the RAID overhead and the enclosure on top.
Why the transcode question decides the hardware
Plex only needs to transcode when a client cannot play the original file and the server has to convert it on the fly — most often 4K HDR down to a phone or an older TV. Doing that in software hammers the CPU; doing it in hardware is effortless on the right chip. That splits the NAS market cleanly: Intel models with Quick Sync (UGREEN N100 and up, QNAP with an Intel CPU) transcode 4K in hardware, while ARM boxes and Synology's Ryzen Plus models have no usable hardware transcode and fall back to slow software.
So if every device in your home direct-plays your files, almost any NAS works and you can save money. If you stream 4K to phones, tablets or a parent's old TV, buy Intel Quick Sync — and note hardware transcoding needs an active Plex Pass to switch on.
Drives and bays for a media library
Media is write-once, read-many and forgiving, so the drives themselves are the simple part: fit CMR NAS drives (IronWolf, WD Red Plus) in the largest capacity with the best CA$/TB, and let the array grow. Four bays with SHR or RAID 5 is the home-media sweet spot — you keep three-quarters of the capacity and survive one drive failing. Fewer, larger drives run cooler and quieter, which matters if the NAS sits near the TV.
Frequently asked questions
Do I need hardware transcoding for a Plex NAS?
Only if a device cannot direct-play your files — most commonly 4K HDR to a phone or an old TV. If everything direct-plays, any NAS works. If you transcode 4K, buy an Intel Quick Sync model (a UGREEN N100 or up, or an Intel QNAP); ARM and Synology's Ryzen boxes lack usable hardware transcode.
How many bays does a Plex NAS need?
Four is the home-media sweet spot: SHR or RAID 5 keeps three-quarters of the capacity and survives a drive failure. Two bays suit a small library on RAID 1; six or more suit very large 4K collections.
Which drives are best for Plex?
CMR NAS drives — IronWolf or WD Red Plus — in the largest capacity with the best CA$/TB. Media is an easy, sequential workload, so standard NAS drives are plenty; fewer larger drives also run cooler and quieter near a TV.