Current command:
mem spiffs copy --help
Copy a file to another (destructively) in SPIFFS file system usage: mem spiffs copy [-h] -s <fn> -d <fn> options: -h, --help This help -s, --src <fn> source file name -d, --dest <fn> destination file name examples/notes: mem spiffs copy -s aaa.bin -d aaa_cpy.bin