The operation can’t be completed because an unexpected error occurred (error code -8060).

Hi,

I'm trying to copy a folder (it's a Xcode project 1.5G) from Desktop to some where else in Desktop as a backup. Everytime I get this error "The operation can’t be completed because an unexpected error occurred (error code -8060)." I saw this kinda error when you want to copy to NAS or NTFS but this one is inside and the same Flash storage.

I have MBPR and Mountain Lion. (Xcode 4.4 if it helps)

Thanks