After reloading the computer and then delete the useless backup, found that some files directory too long, no way to delete the normal, find a lot of methods, suddenly found a command just fine.
Use the Robocopy command.
Robocopy is included in Microsoft Windows Server 2003 Resource Kit Tools (now integrated into Windows Vista and Windows 7), simply to support complex "copy" and "Paste" work, You can create a full mirrored copy of two file structures (including all subfolders and files depending on your selection) without copying any files that you do not need. Only new or updated files in the source location are copied. Robocopy also allows you to keep all relevant file information, including date and time stamps, secure access control lists (ACLs), and more.
1. Start key +r, enter CMD
2. Enter Robocopy, the screen will output cobocopy simple usage
3. Enter the root directory of the folder you want to delete and create an empty folder. For example, if the folder you want to delete is C:\aaa\aaa, create an empty folder under C:\aaa T1
Enter the AAA folder on 4.cmd
5. Type Robocopy/mir T1 AAA
6. Normal removal of T1 and AAA
Record the way to delete a long directory