Well, I just got an R4 a few days ago and it's the best thing for DS. So, I was just putting games on it and stuff until just now, where I actually had to take games off. So I started to take them off when I noticed that taking them off wasn't giving me any more memory for some odd reason. That was at the point where I had no more games left though and couldn't put any more in. My Mac might be doing something harmful to my R4 and I want to know what and how I can fix this problem. My last resort is to take everything off the SD Card and save it in a folder, then format it, but I'm afraid that won't work, and I won't be able to get my stuff back. So please help.