Bad situation. We were doing a demo for a potential customer on a CS-400ci and they brought in a usb flash drive with some pdf files on them to test print. We have never had trouble with this before. This time, we put the drive in the front usb port and it said to format the drive. We loaded the files from the drive to a computer and tried to print and the machine kept showing a JAM 80 where there was no paper. Any other flash drive would print, and any other file from the computer is fine, but these files kept saying jam 80. Anyone seen this?

Is there any of the autoinstall programs on the thumb drive, like on the SanDisk drives now, that want to automatically install and run when you insert them into a PC. This could be an issue, and it could be why the copier is requesting that you format the drive.