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Error in backup 0x807800C5

OS Win 8 pro 64 bit, no third-party antivirus (Windows Defender only).
System state backup on network share failed with error code  0x807800C5

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I have exactly the same setup and problem.
Backups fail with the same error code and a message

The mounted backup volume is inaccessible.Please
retry the operation.

Retry gives the same error message.
The backup volume is a NAS box (WD My Book World Edition)


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Das gleiche Problem bei mir. Fehler 0x807800c5 beim Versuch ein Backup auf LAN NAS Server NAS69940 zu erstellen!

 

Jörn Puscher *** Email address is removed for privacy ***

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Same issue for me on a fresh install of win8. By fresh, I mean formatted drive and no thirdparty software other than firefox
jasv

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I got the same error. Environment: Win 8 Pro 32 Bit, i do upgrade from Win7 Ultimate. Backup on Zyxel NSA320.

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me too, backing up to a QNAP NAS...

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I had the same issue with my synology disk station. For me the following solution was helpful:

 

Perform System File Check (SFC), and then check if this fixes the issue.

Follow the steps:

a.       Press “Windows Key + Q” to open Charms Bar.

b.      Type “cmd” without quotes in the search box.

c.       On the left pane, right click on the “cmd” option and select “Run as Administrator”.

d.      Type “sfc /scannow” without quotes and hit enter.

Note: It may ask for windows installation DVD to fix and to enable SFC to make more than minor repairs. Some files saved on your computer might get deleted when fixing corrupted files.

 

(see also: http://answers.microsoft.com/en-us/windows/forum/windows_cp-performance/backup-error-0x807800c5/95959b0d-8f2b-4bcb-adb7-ecac48b6c239)

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I had the same issue with my synology disk station. For me the following solution was helpful:

 

Perform System File Check (SFC), and then check if this fixes the issue.

Follow the steps:

a.       Press “Windows Key + Q” to open Charms Bar.

b.      Type “cmd” without quotes in the search box.

c.       On the left pane, right click on the “cmd” option and select “Run as Administrator”.

d.      Type “sfc /scannow” without quotes and hit enter.

Note: It may ask for windows installation DVD to fix and to enable SFC to make more than minor repairs. Some files saved on your computer might get deleted when fixing corrupted files.

 

(see also: http://answers.microsoft.com/en-us/windows/forum/windows_cp-performance/backup-error-0x807800c5/95959b0d-8f2b-4bcb-adb7-ecac48b6c239)


Leider unter WIN 8 nicht so anwendbar!

Unfortunately, not to use under WIN8.

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I use Windows 8 Pro and fixed the issue using the steps above....

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I use Windows 8 Pro and fixed the issue using the steps above....


Second try, same result.
57% were saved system image of "(C :)" is created. -> System image was closed and ... error 0x807800c5.

 

When I perform a backup without the system image, there is no error!

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Hallo Joern,

ich habe genau das gleiche Problem und Microsoft meinte man solle seinen Netzwerkspeicher erneut hinzufügen aber auch dies bringt leider keine vernüftige Lösung mit sich!?

Gibt es neue Ideen oder Lösungen aktuell?

Hi Joern,

I have exactly the same problem and Microsoft said I should add my network storage again but unfortunately this is not the solution!

Are there any new ideas or solutions to date?

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Last updated February 13, 2022 Views 81,395 Applies to: