What role does the Volume Shadow Copy Service (VSS) play in Windows Backup, and how can VSS issues lead to 'status_wait_3'?

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Grade: Education Subject: Support
What role does the Volume Shadow Copy Service (VSS) play in Windows Backup, and how can VSS issues lead to 'status_wait_3'?
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VSS creates consistent snapshots of your data while Windows is running, enabling backups without interrupting applications. If VSS fails to create a snapshot or encounters errors, the backup process might stall, resulting in a 'status_wait_3' error due to the timeout waiting for the snapshot to complete. Examine the Event Viewer for VSS-related errors to diagnose VSS issues.