Explorer shows it as E and so does MB. Just more background on the usb stick: it's SAMSUNG BAR Plus 256GB - 400MB/s USB 3.1 Flash Drive Titan Gray (MUF-256BE4/AM). I have it formatted as exFat and have the drive name as Music per my original posting. I've done a quick format and just for shits and giggles did a full format. I have no problem putting anything on the drive from the computer. Just MB isn't cooperating. LOL