i have several "generations" of data (all the way back to archives of files that were on my BBS system) that i still find useful from time to time. as i've upgraded over the years i've added much to my "old data" archive. there are things i eventually weed out, such as old DOS and windows programs, but text, documents, pictures, schematics and service manuals i keep. my biggest problem is i've got duplicate copies of hard drive backups, so i need to weed through all of those. my BBS system had 100Mb of files on it, so even if i didn't weed through it, it's not like it takes up a lot of space on a 2 or 3Tb drive. you never know (the official motto of the Packrat's Guild)... when somebody wants to try rebuilding a retro machine like an IBM PC/XT, and they need a DOS driver for their 10base2 ethernet card.