This seems crazy to me, but it must have something to do with Mac formatting the drive. Because when I inserted the usb stick into a windows computer, it didn't recognize the Fat32 format (I used disk utility to format), and advise I reformat it to Fat32. So I did, and boom, it started working in my printer no problem. I had all of the same issues you had, it wouldn't recognize the factory usb stick, after I had reformatted it with disk utility, it worked.
Best posts made by TotesTanner
This user hasn't posted anything yet.
Latest posts made by TotesTanner
RE: not reading from USB