[FR] MULTI_VOLUME Support

[Guilouz]

It will be interesting to add support for multi volume to choose which volume (SD or USB) to mount.

Usefull for new boards like SKR 2, GTR, Octopus etc

It added to Marlin menu with this PR : MarlinFirmware/Marlin#22004

Multi volume are working in Marlin mode but not on TFT mode.
In Marlin mode print menu gives access to the ability to browse onboard SD storage and onboard USB storage on the motherboard.
In TFT mode we have only access to the onboard USB storage with OnboardSD icon but not to SD storage when MULTI_VOLUME is enabled in Marlin.

[Guilouz]

No one ? multi volume are working in Marlin mode but not on TFT mode.
In Marlin mode print menu gives access to the ability to browse SD storage and USB storage on the motherboard.
In TFT mode we have only access to the USB storage with OnboardSD icon but not to SD storage.

@digant73 @guruathwal can you take a look at this ? I am not experienced enough for this...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[Guilouz]

The request is still relevant.

[github-actions]

This issue has been automatically locked since there has not been any recent activity after it was closed. Please open a new issue for related bugs.