The data drive in my desktop is a 1TB WD1003FZEX. Today I’m adding a new 1TB SN750 SSD.
The WD1003FZEX weighs 1 pound, and has the standard 3.5" form factor.
The SN750 weighs 7.5 grams (the weight of 3 pennies, apparently) and is the size of a stick of gum. It’s... a bit faster.