Modern hard disk drives use a Serial Advanced Technology Attachment or SATA interface to attach to a computer motherboard. SATA drives come in speeds of 1.5 gigabits per second, 3.0 Gbps and 6.0 Gbps.
Many computers these days come with two hard drives, one SSD for fast boot speeds, and one that can be used for storage. My Dell G5 gaming laptop is a great example with a 128GB NAND SSD and a 1TB SSD ...