Hi, I can't copy file to the R4

Hi there, I have downloaded a few games and am trying to put them onto the R4.... I have extracted the files from the .rar files successfully, and am now trying to put the games on to the R4. When I try to copy and paste them, It keeps coming up with a message saying that "An unexpexted error is preventing the operation. Make a note of this error code Error 0x80070570:The file or directory is corrupted and unreadable." What am I doing wrong, or is it that the 3 games I have are corrupted?
Any help much appreciated. ;)

Backup your MicroSD by copying everything on it to your computer.
Format your MicroSD.
Copy everything you backed up back onto your MicroSD and try again.

do you get the same error when extracting directly to your micro sd?If you are going to format it use panasonic SD formatter