Thanks to all that responded to my question! I did a test by formatting a flash drive on the PC, saving a Word .doc to it on the MAC, & then opening the test .doc back on the PC. Worked like a charm! I gave the flash drive to my wife to take to her work & try it on that PC, too, but I don't think there will be a problem. I'll probably back anything important up on a CD-R as well, just to be sure. Thanks again! Frank Wiewandt