Summary

In rare situations, copying the volume folder to another hard disk may result in a silent failure. The copy or move procedure may look successful, but the destination copy may lack branches of the original volume directory structure.

Cause

This is a Windows operating system error. For more information on this issue, please see the following Microsoft Knowledge Base article:

322019 Data Loss Occurs When You Copy Files Over the Network

Workaround

Do not use the Move function as there may be no quick method to recover any lost data. After copying the volume folder to the destination drive, check the file size of the destination folder versus the file size of the original folder. If the destination folder is smaller in size, check for what is missing in the destination volume folder and copy the missing branches from the original to the destination.