unlabeled media

Howdy folks. I've got a bit of a dilemma on my hands. Included in my most recent rescue were a large number of 5.25" floppies and data cassettes---on the order of perhaps a hundred to a hundred fifty each. Only a handful of either are labeled in such a manner as to identify the type of machine they work with. It is safe to assume I have the hardware to use any of the media. The possibilites include: for 5.25" media: Apple II; Commodore VIC-20, C=64, or B128 (8050 drive); Atari 8-bits; Heath H89A; OSI C1P; TRS-80 Model I I'm assuming any hard-sectored media I find belongs to the Northstar Advantage. for data cassette: Apple II; Commodore VIC-20, or C=64; Atari 8-bits; OSI C1P; TRS-80 Model I, or Color Computer; Tomy Tutor; Coleco Adam; TI-99/4A; Spectravideo SVI 328 On top of this, there is the possibility that there are 'digital' data tapes for the Meta-80 drive which works with the TRS-80. From what I can tell, the cassettes are externally identical. I could iteratively run the entire 'unknown' batch through each machine, but it seems like the chance for error there is great, especially with the cassettes. Does anybody have any suggestions on how to do this so I end up with the least chance of error and minimize any destruction of data? Thanks. ok r.