Newer versions of 3uTools attempted to run inside a lightweight sandbox for safety. Windows rejects this sandbox with Code 13. This variable disables the sandbox.
: Ensure the destination folder (often where you save IPSW files or backups) has full read/write permissions for your user account.
This guide will walk you through exactly why this "new" error occurs and the definitive steps to kill Error Code 13 for good. 3utools failed to access folder error code 13 new
Scroll down to and select Add or remove exclusions .
At its core, Error Code 13 is a permission denied error. In computing, error codes in the 13 range traditionally signal a permission issue (echoing Unix-like systems where error 13 is "Permission Denied"). When 3uTools attempts to read from or write to a specific folder—whether a temporary directory, a backup location on the local disk, or a folder on the connected iPhone's file system—the operating system refuses the request. The "New" designation appended to the error likely indicates a specific sub-category within 3uTools' logging, possibly referring to a newer version of the iOS file system structure or a particular module within the software. The root cause is rarely a single problem but a convergence of modern security barriers. Newer versions of 3uTools attempted to run inside
Antivirus and Windows Defender often intercept 3uTools operations, viewing firmware modifications as a threat. Windows Security Virus & threat protection Manage settings Toggle Off : Turn off Real-time protection temporarily while performing the flash or jailbreak.
Corrupted device communication links can cause the software to fail mid-transfer and drop folder pathways. : Ensure the destination folder (often where you
This error isn't exclusive to 3uTools; it's a common code in the world of file systems and applications. According to technical sources, error code 13 is a standard "Permission denied" error, indicating that an application was unable to perform a necessary file operation due to insufficient rights. On iOS and Android, it functions similarly, acting as an access denied error from the operating system itself.
: You can re-enable this immediately after the process completes. Step 3: Change the Firmware Storage Path
The most common fix for permission-based folder errors is granting the app full system rights. Close 3uTools completely. Right-click the . Select "Run as administrator" . Try the operation (flash or backup) again. 2. Change the Firmware/Backup Path
If the folder path is too long or contains special characters, 3UTools might struggle.