i dont know the difference

Digital loads faster

unfortunately

How do I transfer the data from the SD card to the switch? Obviously I don't want to delete it as I lose everything.

http://www.nintendolife.com/forums/nintendo-switch/how_do_i_move_files_from_microsd_to_internal_storage

Also a reminder that there is a thing called google, you can ask it anything.

I was already here