I had a TRaSh-80 Mod I also. I saved up for the 16k level II basic option, then the Expansion Interface, then had to get on the waiting list for the 160k floppies. While I was waiting, I tried the Exatron Stringy-Floppies (tiny little tapes that held up to a whopping 40k! Oooh!)
In college, I got to play with the IBM 360 mainframe. I remember when IBM loaned us an extra megabyte of main memory - wow! We either had to use punched cards (let them hold your student ID, and they\'d loan you a drum for the 029) aor stand in line and use the teletype terminals - hardwired in to go at a blinding 600 baud!