I have a MUVO 64MB. The only thing I'd watch out for/test for with this USB memory modules is dropping them. I dropped my MUVO accidently from a height of about 2 feet. It apparently jumbled some of the electrons, and resulted in skipped playback. Once I "reformatted" the memory, and placed the songs back on, the problem went away.

With that in mind, definately go with the multiple formats. Make sure to include a plain-text version readable by any operating system. Do the same for graphics and store them in a somewhat universal format of some kinda (maybe jpeg or bitmap). For really important information (say... telephone numbers, or account numbers) you should make multiple copies. Just change the filenames.. (i.e. telnums1.txt, telnums2.txt) In the event something gets damaged, you might be still be able to put the pieces together.

FYI, Linux and Unix systems have more utilities in the "standard" distributions than do Windows as far as I know (AFAIK). (i.e. strings utility)

It would be a shame to have important documents in pdf completely unreadable because of a few byte errors. I would highly recommend the redunancy of multiple formats, at the very least, a text (.txt) file of the information, or in the case of graphics, a bitmap (.bmp) or jpeg(.jpg or .jpeg) file.