Software⏱️ 4 min read📅 2026-06-11

How to Fix 0x8078015B Error – How to fix Windows Backup Error Code 0x8078015B

Windows Backup error code 0x8078015B, Windows Backup failed with error code 2155348315, Windows Backup encountered an error when accessing the remote shared folder.

Quick Answer: Check if the network attached storage drive is properly configured and connected to the laptop's network. Ensure that the backup account has sufficient permissions to access the shared folder.

Windows Backup Error Code 0x8078015B occurs when the backup operation fails to access the remote shared folder. This error affects users who are trying to set up Windows Backup to backup their data to a network attached storage drive. The error is frustrating as it prevents users from backing up their important files and can lead to data loss if not resolved promptly.

Resolving this issue requires patience and persistence, but with the right steps, you can identify and fix the problem. In this guide, we will walk you through the primary fix method and provide alternative solutions in case the first method does not work.

💡 Why You Are Getting This Error

  • The primary reason for Windows Backup Error Code 0x8078015B is a permissions issue with the remote shared folder. The backup operation requires read and write access to the folder, but if the user account running the backup process does not have these permissions, the error will occur.
  • Another possible cause is a configuration issue with the network attached storage drive. If the drive is not properly configured or recognized by Windows, it can lead to this error.

🚀 How to Resolve This Issue

Fixing Permissions Issues

  1. Step 1: Step 1: Check the permissions of the remote shared folder. Right-click on the folder and select Properties. In the Properties window, click on the Security tab and check the permissions for the user account running the backup process. Ensure that the user has Read and Write access to the folder.
  2. Step 2: Step 2: Update the group policy settings to ensure that the user account running the backup process has the necessary permissions. Open the Group Policy Editor (gpedit.msc) and navigate to Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment. Look for the 'Read' and 'Write' permissions under the 'Object Creator' group policy and update the settings accordingly.
  3. Step 3: Step 3: Restart the Windows Backup service and try running the backup operation again. This will ensure that any changes made to the group policy settings take effect.

Fixing Configuration Issues

  1. Step 1: Step 1: Check if the network attached storage drive is properly configured in Windows. Open the Disk Management tool (diskmgmt.msc) and verify that the drive is recognized by Windows. If not, you may need to reinstall the driver or update the device settings.
  2. Step 2: Step 2: Update the network attached storage drive's properties to ensure that it is correctly mapped to the user account running the backup process. Right-click on the drive and select Properties. In the Properties window, click on the 'Map network drive' button and enter the correct path to the drive. Ensure that the drive is mapped to the user account using the correct credentials.

🎯 Final Words

By following these steps, you should be able to resolve Windows Backup Error Code 0x8078015B and successfully backup your data to the network attached storage drive. If you encounter any issues during the process, do not hesitate to seek further assistance from a qualified IT professional.

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