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Scheduled Backups gets to Progress 100% and fails but manual backup works fine

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I have a GFS backup policy applied to 7 machines with scheduled backups for 1:00 AM. Every night 6 of them backup fine, but 1 of them gets to 100% and errors with this message:

Failed to write data to the backup file.
A possible reason might be poor media quality.

This happens whether that day's backup is "Daily backup" or "Weekly backup." However, when I then manually click the "Run" button on the exact same task the next morning, the backup proceeds and finishes without any errors.

What do you recommend?

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Hello Jeremy!

Thank you for finding time to join us and report about the issue you've faced. I completely share your concern and will be glad to help you!

Unfortunately it is difficult to identify the exact cause of the issue due to the lack of sufficient diagnostic information. Could you please specify the following information? 

  1. Where the backup is stored? 
  2. What exactly is being backed up?
  3. Acronis System Report
  4. Windows System Information File
  5. Acronis Info

After that please kindly contact support directly with the information attached. Keep in mind that should there be any procrastination with the reply, you can always specify us the case number. We will do our best to speed up the process.

Should you need anything else or have any further questions - feel free to contact us at your earliest convenience, we will be happy to help you!

Thank you!