I have been working with some files on an external hard drive in an enclosure connected via esata via thunderbolt to esata adapter. when I try to rename some folders, individual files, & change cases of file extensions, it either just does not work, or I get an error; -47 os error, cannot rename file, it is busy, but I do not have the files in use in any other app except pathfinder. I updated pathfinder, & I now or have not gotten the error message, but still some things will not be renamed. I have checked permissions under get info for my hard drives, it says I have full read & write. I tried doing renaming with files that are just on my mac mini internal drive, & it lets me rename etc. so is it the enclosures that are doing this? or could the files themselves that are on the external drives be corrupt somehow?