I've got around 1Tb, a little over if I count my Laptop.
Like some of the others my earliest exposure was on a PDP11, my first real computer was a DSE syetem 80 (Z80 Based) which was a wonderful platform to experience Basic and machine code, as well as a hardware fiddlers delight. I remember upgrading from the stock 16K of ram to a whopping 48K by pigybacking the ram chips (physically soldered on top of each other, all pins with the exception of RAS and CAS from memory
)
Programs were stored on a very dodgy audio cassette interface, but those with money to burn, could buy an S100 interface with up to 2 floppy drives.