Add the entire (typically located at C:\Program Files (x86)\3uTools ) to the exclusion list.

Locate the current path for or Backup Directory .

When 3uTools triggers Error Code 13, it means the operating system actively denied the application's file request. The underlying culprits generally fall into four categories:

Antivirus programs frequently block 3uTools from modifying system directories or writing firmware files to your disk.

: If you've manually renamed a backup folder, 3uTools may lose track of it. Ensure the folder name matches your device's UniqueDeviceID (UDID) in lowercase. You can find your UDID in 3uTools under Device Details .

: Right-click the 3uTools shortcut and select Run as administrator . This often bypasses restricted access to folders like AppData or Roaming .

To resolve the 3utools Failed To Access Folder Error Code 13, try the following troubleshooting methods:

The iPhone is locked, or you haven't selected "Trust this Computer."

Security software flags the data transfer as suspicious and locks the folder.

Temporarily disable the real-time shield if the error persists during a critical firmware flash. 5. Repair the Apple Device Drivers

Open 3uTools and click the in the top-right corner.

Go to the tab and uncheck the Read-only attribute at the bottom. Click Apply .