I already have my SD card partitioned, have for a long time. Its currently upgraded to ext3 but a few new ROMS out there suggest upgrading to ext4. My question is do I need to reformat my card and then repartition or can I just upgrade to ext4? Another questions is how will upgrading to ext4 affect ROMS that are currently on ext3? I have a few more questions but I'll wait to see if you guys answer them in your responses.