Fix Maverikcs “One or more items in… can’t be changed because they are in use” error

If you’re getting  “One or more items in… can’t be changed because they are in use” error copying from external disk here the easy fix: 

launch terminal and use the following command:

xattr -d com.apple.FinderInfo <filename>

Example:

xattr -d com.apple.FinderInfo Kitesurf-Mavericks.mp4