This Driver/Utility for Mirco Advantage USB memory sticks works for all sizes as far as I know. It might work for NT because XP is similar. I know it works for XP service pack one. When I installed service pack two my stick caused my PC to crash. There is a utility to password protect a portion of the stick and to read/write test and reformat the whole stick. Regular format from Microsoft only formats the public part of stick the utility resets the WHOLE stick. This might fix the crash problem. I am going to try it. It is a little quirky installing the driver/utility. It asks you to remove, then reinstall the stick (bad Chinese translation) a few times and reinstall the driver/utility again. I installed it twice and it worked fine.