You also can't backup at all if there is too much data for your iphone. https://www.reddit.com/r/applehelp/comments/dsx6o9/whatsapp_backup/ https://www.reddit.c

You also can't backup at all if there is too much data for your iphone. https://www.reddit.com/r/applehelp/comments/dsx6o9/whatsapp_backup/ https://www.reddit.com/r/applehelp/comments/dsx6o9/whatsapp_... is an example of people looking for ways to make this work.