Find the Cheapest 8TB NAS Drive Today
8TB NAS-rated CMR drives by price per TB
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The best 8TB NAS drives are NAS-rated CMR models. 8TB is in the value sweet spot, the size most home and small-office NAS buyers should choose. Choose a CMR drive (WD Red Plus, Seagate IronWolf or Toshiba N300) and avoid SMR for a safe RAID rebuild. The live table ranks current 8TB drives by price per terabyte.
Who a 8TB NAS drive suits
8TB is in the value sweet spot, the size most home and small-office NAS buyers should choose. It suits a 2-bay or 4-bay unit for a growing Plex library, photo archive and backups without overpaying for capacity you will not use for years.
8TB is a strong Plex size: a pair or a four-bay pool gives room for a real 1080p and 4K library with headroom to grow over a couple of years.
Where 8TB sits on the value curve
This is the cheapest part of the price-per-terabyte curve. 8TB drives typically give the best value per terabyte of any NAS-rated size, which is why 8TB to 12TB is the most common recommendation. You pay a little more in total than a small drive but far less per terabyte.
At 8TB the value picks are WD Red Plus, Seagate IronWolf and Toshiba N300, which trade the lead on price per terabyte. The live table is sorted so the cheapest per terabyte is at the top.
Usable capacity from 8TB drives
| Use case | Best choice | Why |
|---|---|---|
| 2x 8TB, RAID 1 / SHR | ~7TB usable | A mirror: survives one drive failure, half the raw capacity. |
| 4x 8TB, RAID 5 / SHR | ~22TB usable | Single parity: survives one failure, about 75% of raw. |
| 4x 8TB, RAID 6 / SHR-2 | ~15TB usable | Dual parity: survives two failures, the safer choice at high capacity. |
The 8TB buying note
The trap here is still SMR avoidance on the cheapest listings, but at 8TB the NAS-rated CMR drives dominate, so simply choosing a Red Plus, IronWolf or N300 keeps you safe. Match drive sizes within a pool unless your NAS supports Synology SHR.
Available NAS-rated families at 8TB: At 8TB every NAS-rated family is available: WD Red Plus, Seagate IronWolf and IronWolf Pro, WD Red Pro, Toshiba N300 and enterprise Exos. That competition is part of why this band is the best value.
8TB NAS drives, by price per TB
Frequently asked questions
How many 8TB drives do I need for around 22TB usable?
Four 8TB drives in RAID 5 or Synology SHR give about 22TB usable after parity and overhead, with single-drive fault tolerance. Two 8TB drives in a mirror give about 7TB. For two-drive protection, four in RAID 6 or SHR-2 give about 15TB.
Is 8TB a good size for Plex and backups?
Yes. 8TB is in the value sweet spot and suits a 2-bay or 4-bay NAS for a real Plex library, photo archive and backups with room to grow. It is the size most home buyers should pick.
What is the cheapest 8TB NAS drive?
At 8TB the value picks are WD Red Plus, Seagate IronWolf and Toshiba N300, which trade the lead on price per terabyte. The live table is sorted so the cheapest per terabyte is at the top.
Does a 8TB drive need RAID 6 instead of RAID 5?
Not necessarily at 8TB. RAID 5 or SHR rebuilds quickly enough at this size for most home use. RAID 6 or SHR-2 adds a safety margin if the data is irreplaceable, at the cost of one more drive of capacity.