This may not be neccessary, but I really want to format the sd card on my phone. I will pull out the important files and some media I want and have them backed up on my computer. However, I have downloaded so many roms, updates, and stupid applications that I barely know half the crap when going through my files. Even after deleting applications they leave info behind and i feel like my phone has really slowed down from all this junk. My question is basically is this safe on a rooted phone? my thought is if i delete the cm7 file (which is the rom im currently using) then how would my phone possibly be able to keep running cm7? Should i sbf and then do a formatting? any help is much appreciated.