Make sure your USB memory device meets these
requirements.
Note: Connections
that use an extension cable, a USB hub, or a card reader cannot be
guaranteed.
FAT device
compatible with Windows
Format type:
FAT 32
No security
functions such as encryption or passwords
Memory
capacity: Up to 128GB
Partitions:
1
Requirements for data
Data name:
Up to 255 single-byte characters
Data size:
Up to 4GB
Number of
data items: Up to 256 (.prn files only)
Note: The printer
only searched the root folder on the USB memory device for files
with a .prn file extension. If the data is saved in a sub-folder or
named with a different file extension, it does not display when the
USB memory device is connected to the printer.