Feature suggestion: littleFS support?

[owlshrimp]

https://hackaday.com/2019/01/24/cool-tools-a-little-filesystem-that-keeps-your-bits-on-lock/ https://github.com/littlefs-project/littlefs

On top of the basic drive I/O routines it might be useful to implement littlefs, a filesystem made for microcontrollers. AFAIK all you need to do to port it is to provide it with implementations of a few functions for reading/writing/syncing blocks.

The filesystem is simple and light weight, far more robust than FAT, and every operation is atomic.