If you insert the flash drive when an error message appears, then the printer ignores the flash drive.
If you insert the flash drive while the printer is processing other print jobs, then Busy appears on the display.
From the display, touch the document that you want to print.
If necessary, configure other print settings.
Send the print job.
To print another document, touch USB Drive.
Warning—Potential Damage: To avoid loss of data or printer malfunction, do not touch the flash drive or the printer in the area shown while actively printing, reading, or writing from the memory device.