We archive floppy discs from old PCs and Macs. 5.25" (5 1/4 in) floppy discs and 3.5" (3 1/2 in)discs data can be converted to a modern readable file type ranging from text documents and midi sequence files. We can read audio files and samples from Classic Mac (pre-USB) internal hard drives, IOmega Zip and Jaz and Imation Superdisk.
As with any type of magnetic tape, computer disks are subject to deterioration over time. If discs have been stored far away form speakers or CRT TVs there is a pretty good chance they are still readable. However, the clock is ticking on the machines that can read them.