How can I open a directory for an external connected music player?

I would like to add tags to music already on my music player. When I connect the player to my laptop and ask mp3tag to add a directory, the music player does not appear as an option. Is there a workaround for this? (I should add that the player does appear in File Explorer.)

MP3tag can access this device only if it gets a drive letter.

Thanks for that - next challenge is to assign a drive letter. The player doesn’t appear in Disk Management :grimacing:

Is that an Android device?
You would have to assign the correct USB mode on the device:

Thanks - looks like it’s MTP that’s the issue. I’ll have to tag files on my laptop and transfer / replace them on the player. I was hoping to avoid doing this because it will remove associated playlist information saved on the device.