HDD
Hard disk drive
3.5 inch
2.5 inch
SSD
Solid state drive
2.5 inch
mSATA
m.2
Flash memory (no moving parts)
SMART
Self monitoring, analysis, and reporting technology
ATA ver. 3
Internal drive program that tracks errors and error conditions within drive
ATA
Advanced technology attachment
SATA
Serial ATA
point to point connections between SATA device and SATA controller
7 connectors
Thinner cabling
Max length of 40 inches
No max number of devices
NVMe
Non volatile memory express
Supports communication between OS and the SSD directly through a PCIe bus lane