SD Card / U-Disk Mount over USB

[nezil]

As I'm sure is the case with many users, I use OctoPrint to control my printer, and once installed in my case, the SD Card slot will not be easily accessible, and I will need another method of loading firmware on to the card.

All previous BigTreeTech boards have supported mounting the SD Card as a drive over USB, but this doesn't seem to work on the SKR-2. Please could you confirm if this is possible or not, and perhaps suggest a work around if not.

I have tried using the Marlin Binary File Transfer approach to copying files, but this seems to result in a corrupt file after transferring. I'm not sure if this is a Marlin issue, or another SKR-2 problem.

Thanks for taking a look at my request.

[LawnMo]

someone will tell you to try "M22" (gcode to unmount your microSD) and get really upset or mute.
As far as I can tell, this chip is supposed to have what it takes to do composite usb (and share the volume(s) with an host, pc or octoprint).
Now, in reality it never was tested by anyone and nobody knows.

Best guess is we need a _USB build env variant for this board or w/e. (and we also need @bigtreetech to answer about this board capabilities as requested in : #22 but that's obviously too much to ask when they barely do shit or document anything in a proper way)

[dotdash32]

This has been fixed in Marlin #22354, and is now on the bugfix-2.0.x branch. I've tested it, it works for me.