When looking at hard drives, the protocol (IDE, AHCI or NVMe) needs to be understood to get the right interface (ATA, SATA or PCIe) drive for your system. Today's M.2 Drives can be confusing with all the different keyed interfaces (B Key, M Key and B&M Key). Then to really confuse you, M.2 can be SATA or PCIe - So in this video, I am going to help shed some light on this and make things easier to understand.