Why create a thread for this question? It would have been fine in the official nxmtp thread. But anyway, yeah, 4GB size limit, as stated. For the person asking what files could possibly be bigger than 4GB files >> xci files. Simple solution is to split them, they still work fine in SX OS. And before someone tells me xci files should go on an external hard disk formatted as exFAT and don't need to be split, consider that some people like to keep the Switch portable.