Check if the printer is not busy processing another print, copy, scan, or fax job.
Is the printer ready?
Go to step 2.
Wait for the printer to finish processing the other job.
Check if the flash drive is supported. For more information, see Supported flash drives and file types.
Is the flash drive supported?
Go to step 3.
Insert a supported flash drive.
Remove, and then insert the flash drive.
Does the printer recognize the flash drive?
The problem is solved.
Contact customer support.