My PassportThe pocket drive most people own. The disk inside is ordinary; the USB bridge in front of it is not, since it encrypts everything on the way past. Bridge dies, drive disappears — and only that board holds the key.
My Book and ElementsThe mains-powered desktop units, three and a half inches of platters. My Book encrypts through its bridge much as a Passport does; Elements normally passes the disk straight through. Both slow badly as they age, and both image slowly when they go.
Blue, Black and NVMeThe internals: SATA drives in desktops and laptops, SN550 and SN770 sticks in newer machines. When one stops being listed, that is bench work.
Utilities, encryption and SMRThree limits worth knowing. Drive Utilities and Dashboard diagnose; they recover nothing. Encryption is real — lose the original bridge, or the password where one was set, and the data stays shut. And shingled drives image slowly, whatever you pay.