I just recently bought a F90BT and want to put on the Cmh928 mod but I need to backup my unit first. I know I need to use the testmode thing and copy the flash disk onto an SD card but whenever I try to do that it says that there is not enough space on the card. I'm using an 8GB card and it wont work. How big of a card do I need to have in order to backup the whole unit? Thanks for the help.
-Brian