NAS Hard Drives

NAS-rated mechanical drives — Seagate IronWolf and SkyHawk, Western Digital Red and Purple, and Synology HAT models — rated for the vibration and duty cycle of a multi-bay enclosure, which is what separates them from a desktop drive.
Buy matched capacities for a RAID set, and check your NAS vendor’s compatibility list. Surveillance drives (Purple, SkyHawk) are tuned for the continuous write of camera recording rather than general file storage; for cache or all-flash, see NAS SSDs.