Help! My micro SD!

well guys I got my 3 SD cards and 2 of them are now corrupt! So what happened, I copied some files and I was Pasting in my sd cards and randomly in my 1GB and 512MB sd cards, an error came and then my files that I was pasting on my cards were canceled and Files of 28.(some, I don't know exact)GB were in my Cards those files suddenly showed up! I tried to format, I tried to run on R4DS and I tried to repair my sd's with some programs and failed! :( :( :( :( :( :( :( :( :( :( :( :( :( :( :( Now, Please Can anyone help me

Run chkdsk on them.

but my computer doesn't reads this!

Probably bad. Try using another reader.

Ive had this happen before... If you have an r4 i can help i think. If the micro SD still works while in the r4 you have to delete some games from the micro SD using your DS. Then it worked for me idk if you have the same problem try it. to delete a game using your r4 just hover over the game and press "x"