My earliest "large" program which I can remember was a drawing program I wrote in GW BASIC. You could draw figures, change brushes, I think it had a crude filling function and a few other things. In my innocence, I backed it up onto 5.25" floppy disks, labelled them neatly and put them in a box. This was in the late 1980s.

Fast forward to 2024, I still have the disks but no drive to read them. On the other hand, the notebooks where I wrote out some of the routines for the programs are still with me and I can read them. Says a lot about "digital archiving".