Are you getting copy error finder 36 frequently on your Mac. The error message is stated as The Finder cannot complete the operation because some data in “Folder” can’t be read or written (Error code-36). This generally happens when you try to copy a file from one location to other on your Mac system. This is a type of I/O error that may occur due to any improper changes in the permission settings of the files. The other reasons for copy error finder 36 is the corruption in the source or the destination volume. For this you may have to check the drive by using disk utility or you have to format it. If the error shows while the process is in progress of copying then this may corrupt the files that were being copied. If the copy error finder 36 always bothering you then you may have to re-install the operating system. Don’t worry bout the data as it can be recovered using Mac data recovery software. It will perform the scan and recover any kind of data you have lost after you have fixed copy error finder 36.