On the HDD (and backed up): 2600 photo images in 130 folders, 3.02 GBy 250 uploaded images (sent to friends, here, etc.) 19,000 downloaded images (for my reference, fair usage, personal use, not for distribution), 1.17 Gby Even though you didn't ask ... film and slides ... as a guess about 5,000 images Other media (LP, cassette, CD, VHS, DVD) ... about 1,000 books that are graphics intensive (art books, herbals, maps, costume, crafts, construction, schematics, graphic novels, &c.) ... about 1,000 books related to computers over 500 books related to history over 500 all other books (mostly SF&F) could be about 4,000 MGD