I am using a 32GB Sandisk microSDHC card, that does not show the class. It has what looks like a capital "I" next to where it says microSDHC, but no class appears on the front of the card. My max card read speed when copying ROMs onto this card has been about 6MB, but is usually 4-5MB, tops. Filling all 29.7GB of available space takes about an hour from start-to-finish. I've had to copy my entire ROM collection (at least what will fit) a total of four times now, and am sick of it. Tried using various defragging utilities, but all of them take forever and a day, and they always usually leave at least one ROM fragmented. The solution I found was to just format the whole card and re-copy all of the everything. Is there a faster, more efficient or better way of just adding or removing a single ROM, without causing any fragmentation issues? Thanks in advance.