Micro SD problem

Uh, yeah, it's a big problem. I lost half of my files in my 4gb Micro SD. BTW, I'm using TTDS for my storage. I checked the properties that I used up 3.5gb of space but the visible files only add up to 2gb. I tried showing the hidden files but the files still aren't there. What's up? Is my Micro SD corrupted?

Are there any files on it with messed up names like ih#78N&!@? If so, then it's corrupt and you'll have to reformat it.

Nope. There aren't any files with messed up names. It's just that half of my files are missing.

You didn't remove them with your DS?

Last time I used it, I didn't remove it. Basically it happened around three hours after I last used my DS.Like I said, the space used is still the same (3.5 gb) but the remaining files only add up to 2 gb.