On Aug 30, 2015, at 10:42 PM, Glenn English <ghe@slsware.net> wrote: > Yet another possible possibility: > > * Is the disk backward compatible with USB2? If so, does it work with a USB2 card? Might get rid of some variables. Yes, that’s the first thing I tried. The disk (and all the USB2 and USB3 thumb drives I’ve tried as well) work just fine with a USB2 card — but at USB2 speeds. Aren’t computers fun!? Rick