In a video I saw by Dale Mathis of Crown Accordion, he had a problem with some USB sticks. I don't remember what the brands were. I have used a SanDisk 16 GB with no problem. It is way more memory than you need but a 2 Gb stick was harder for me to find. The SanDisk worked right out of the package (no formatting needed). The only thing a did was to make a "clean" disk and erased all the files that came on the disk. I think they were "security" type files. Here is a link to the disk:
John M.
Amazon.com: SanDisk 16GB Cruzer Glide USB 2.0 Flash Drive - SDCZ60-016G-B35 : Everything Else
Buy SanDisk 16GB Cruzer Glide USB 2.0 Flash Drive - SDCZ60-016G-B35: Everything Else - Amazon.com ✓ FREE DELIVERY possible on eligible purchases
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John M.