[PROBLEM] controlling usb device via mpd?

[tordenhaand]

Can I plug a USB drive with music to the RPi4 usb port (and unplug it when needed without having to do the setup again) and play/control the music on the drive through mpd/moode web ui?

Yes, you need to plug in and do a library update to index the files. There is an option to do this when the drive is plugged/unplugged in the library config tab.
However, I'm unsure if the Pi will recognise the ipod running rockbox as a usb drive.

Judging on your input and reading through the two threads linked below, it seems like imy request would be easily doable if my ipod was just a normal sd-card (or sd-card in a usb adapter), but three things *might* complicate it:
1) the rockboxed ipod might not function as a normal usb drive
2) the fact that I want to be able to plug the ipod in and out
3) power issues (not necessarily a problem)

External USB drive not detected under mOode 6.4.0
[How to do instruction] Using large uSD card for OS and music
Am I on the right track or should I go about this in a completely different fashion?
---
And again thank you for further pointers on the power button sidetrack!