Try this 1
They are some folders like "System Volume Information" where
the user don't have access to it. For such folders "Access Denied" message will
appear. So don't worry about it. Enter that command, wait for a while until the
process get completed and then make sure that your files are removed from
Alternative Method :
Click on Start --> In search box, type control folders and press Enter.
[If you are using Windows XP then type control folders in Run and press Enter]
"Folder Options" will be opened. Click on the "View" tab.
Now select the option "Show hidden files, folders or drives
" and uncheck the
check box "Hide protected operating system files
" --> Click on "OK" button.
Now look for your files in your external drive.
Later undo the changes you have made by once again going to "Folder Options"
--> Click on "View" tab and click on "Restore Defaults" button --> Click on "OK".