I have all of the pictures taken by my family members dating back to 1885 or so. Scanned form slides, prints, and even plates and etchings.
All together they make up about 60,000 images and take just over 40gig to store (they average 500k/1M each). I have them here on disk, on a flash drive in my safe-deposit, and on a server on a different continent, juuuussst in case.