Thanks for the contribution.

This feature has actually been requested a few times, and was implemented as a separate .label() method in #13470. There I argued for the C-time macro to be added to the rp2 port, instead of a new function.

I actually think a separate function is more useful than adding a keyword argument to mkfs() (as done here). Because what if you want to relabel the filesystem without formatting it? Or maybe that's not a common use case, and that labelling it during formatting is all that's needed? After all, in #13470 the use-case was to label during formatting.

If we did go with a separate .label() method, it could be possible to retrieve the label if no arguments were specified, eg if vfs.label() == "ABC": ....

This was the trade-off I was also thinking. The microcontroller rarely cares (or should) about the volume label, so it's more a quality of life for when the controller is plugged into a computer, and is likely not changed often.

A separate function to set/get the label is more overhead than I think is required, and getting the label has many edge cases that for when volume labels aren't supported, but yes there isn't a straight forward solution.

I'm closing this PR because it's not the way forward.

Code size report: