Hai I am Ashik. I think i can hep you
Here is to unock the files
Select the file you are trying to move, then choose Get Info from the File menu. If the Locked box is checked, deselect it, then try moving the file again.
If the item you are trying to unlock is a folder,use these steps:
If you have attempted to unlock a file in the Finder but it is still locked, follow these steps to remove the system immutable bit from affected files, which can cause this issue.
Mac OS X 10.4 or later