i encountered this problem recently.

Bought a samsung USB2.0 external BOX. (HD)

upon clicking on my folders, i am not able to access one of them.

Error message "The file or directory is corrupted and unreadable."

however, the rest of the folders in the drive works fine.

I wish to recover the data inside. Can someone help me on this. I do not wish to reformat my drive.

try some data recovery software but its no use as i cant even enter the folder. I need to repair the whole folder. Thanks.