Some users on the Microsoft Answers forum are reporting that when using the Backup and Restore Tool and a USB external drive to create a system image backup on their Windows 11/10 PC, the operations fail with succession and/or a combination of error codes viz: 0x807800C5 and 0x8078004F. In this post, we will offer the most suitable solutions to this issue.
There was a failure in preparing the backup image of one of the volumes in the backup set (0x807800C5)
The mounted backup volume is inaccessible, please retry the operation (0x8078004F)
System Image Backup failed, Error Codes 0x807800C5 and 0x8078004F
If you’re faced with any of these error codes, you can try our recommended solutions and see if any of them help you resolve the issue.
- Temporarily disable the Security software
- Restart Volume Shadow Copy
- Create System Image using PowerShell
- Prepare external drive to backup multiple system images
- Format external drive
- Use third-party imaging software
Let’s take a look at the description of the process involved concerning each of the listed solutions.
There was a failure in preparing the backup image of one of the volumes in backup set, Mounted backup volume is inaccessible
1] Temporarily disable the Security software
Temporarily disable the security software and then try the operation and see if that helps.
2] Restart Volume Shadow Copy
Open Services Manager, locate Volume Shadow Copy services, right-click on it and select Restart.
Now try and see if that helped.
3] Create System Image using PowerShell
If you’re encountering these error codes using the GUI to create the system image backup, it’s possible the program is glitched. In this case, you can try creating the system image using PowerShell on Windows 10.
4] Prepare external drive to backup multiple system images
By default, you can only create one system image on an external USB drive. If you have an existing system image for a computer and are creating a new one for the same computer, the new system image will overwrite the existing one.
So, if you already have a system image on the external drive and encounter these error codes, it’s possible that the system is unable to overwrite the existing system image.
In this case, you can follow the instructions in our post to prepare the external drive to allow backup of multiple system images.
5] Format external drive
This solution requires you to format the external drive and then try the system image backup again. If that doesn’t work, you can try using another USB drive.
6] Use third-party imaging software
If nothing still works at this point, you can use any of the 3rd party Imaging, Backup and Recovery Software.
Any of these solutions should work for you!
Related post: System Image Backup failed, Error 0x80780038 on Windows.
Why does my system image backup keep failing?
System image backup failure can occur due to corrupt backup files or mismatched partition information. To resolve this, boot into Windows Recovery Environment (WinRE) using a Windows installation media, and attempt to restore the image. Ensure your backup files are intact and partition configurations match the original system setup.
How to fix Windows backup image error 0x80780119?
To fix Windows backup image error 0x80780119, ensure your storage drive, especially if external, has sufficient space and is formatted to NTFS. Clear up existing backups or increase the volume’s size. Check your System Reserved Partition and System Protection settings to ensure they have adequate space for shadow copies.