Go into the 'Files' Folder. Once it is displayed, double click on 'System'. You will get some sort of Message popping up warning you about making changes to the system, Click 'Got it'. Once into the System go down to 'mnt' and go into that, then into 'extSdCard', then choose wherever you want to transfer files into on your card, or right click and make your own folder to add to. Then transfer your files the same as you did for transferring into your phone's file system.Simple!