What file system does the USB drive have on it?
This matters if you have ever reformatted it.
This matters if you have ever reformatted it.
Did the drive come with software and folders already installed on it as Jim noted above? Also, have you tried the sandisk again to confirm that it's still working to rule out the possibility that something downstream of the drive isn't working correctly?I googled how to format the drive and it does say it is FAT32...