Electronic storage media have a limited life. A tape may disappoint you in twenty years, especially if it isn't stored under optimum conditions. You might consider transfering your recordings to CD. They seem to have the longest foreseeable life. Of course, there is always the "Dead Media" problem (try finding a place to playback 1" or 2" videotape or eight track audio tapes today) but the CD is ubiquitous enough, it will be around long enough to take the material into the next storage technology era.

I am dealing with problems such as this now with a very large historical archive of tape recordings, papers, photographs, videotapes, and films. Time can sure be vicious.

Sourdough