A couple of points with Scan to USB
1. The USB device has to be formatted as 'FAT'. The machine can't read 'FAT32', 'NTFS' or other different types of partitions.
2. Toshiba's will only recognise certain sizes of flash drives. This is sometimes dependant on the machine and the firmware version on that particular machine.
3. From memory, the biggest limiting factor is the read / write speed of the flash drive. If it doesn't meet certain requirements, then the machine won't read it.
4. Make sure that if the flash drive has write protection, it is turned off.
5. And this is what the service manual says.
- A device compliant with the following specifications established by USB-IF (USB Implementers
Forum)
Class number: 8 (=08h) (Mass storage class)
Sub-Class number: 6 (=06h) (SCSI transfer command set)
Protocol number: 80 (=50h) (Bulk-only)
Hope this helps.