[Global] USB OTG Mounting of Internal FS and SD Card

[rouing]

It would be nice to have the ability to mount the SD Card (and potentially, the Internal FS) over USB so that things can be added to it easily.

Questions to be answered:

• Has any work been done to this effort already?

• Are there examples we can use?

• Which devices would support this? Which devices wont?

• Do we automatically mount the FS on connection or only if its toggled on/off in the Config?

• Where in the UI would we put such settings?

• File Layout and Structure? Location?

• Will we need any additional libraries for this?

• Is there a library we can use to make this easy?

[rouing]

USB MSC - Espressif Docs

[bmorcelli]

I have searched for that in April to use it on Launcher, and unfortunetly couldn't find anything..

what I know is:

• ESP32 doesnt have OTG interface, and their USB plugs are connected to a dedicated UART->Serial converter that can't be used for other kind of purpose..
• ESP32-S3 usually have OTG and the USB can be used as other purposes such as HID etc, but I don't know if it can in fact read and write from flash drivers with good performance (https://github.com/espressif/esp-idf/tree/master/examples/peripherals/usb/host/msc), (https://esp32.com/viewtopic.php?t=35266), and in this case there are no Arduino Library for that purpose.

[rouing]

There is a way to do this as ive seen it done before. Its surprisingly hard to find a quick example that allows for exposing the SD Card, not just the internal flash.

Also: Yeah this can only be done on the ESP32-S3. I do hear the performance is basically USB1.1 but if were just uploading small files, that shouldnt be an issue.

[IncursioHack]

Done!
#891