HDD(Hard Disk Drive)
A spinning magnetic drive offering large capacity at a low price per terabyte.
HDDs are the workhorses for bulk media and backups in a NAS. Use CMR drives rated for 24/7 NAS use and avoid slower SMR drives for arrays.
Related articles
SSD(Solid-State Drive)
Flash-based storage with no moving parts, far faster and quieter than a hard drive.
SATA
The common interface for connecting hard drives and 2.5-inch SSDs to a motherboard.
NAS(Network-Attached Storage)
A dedicated storage device connected to your network that lets multiple devices store and access files centrally.