ITG Cabinet Question (USB)

[Kibblre]

I just started playing ITG again this month in a semi-serious manner, something I've never done before. It used to be just playing a round or two then be done, but hacked machines give more incentive to keep playing. K, question is, how do I know if my USB stick will work? I just bought one before going today and the cabinet wouldn't read it. I know it's not a problem with the reader because my friend uses his. I returned it for a different one, but won't be able to check until next weekend. Is there anyway I can know for sure it will work?