answer:My first approach would be to try a different USB port, then a different computer – better still if you can try it on a different OS (so, Mac if it didn’t work on a PC and vice versa). I’ve had some luck accessing files on Linux from a zip drive that didn’t work with Windows (and this was the same laptop). If that doesn’t work, you probably still have some options, but don’t do anything like reformat the zip drive – that will destroy the file for sure.