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usmt-dash/Documentation/Device Storage Remediation.md
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Device Storage Remediation

USMT needs free space on the source device for its working files. Devices under about 15 GB free often fail the backup. USMT Dash shows free space in the USMT Status table.

1. Remove stale profiles

  1. Press Win, type About your PC, open Advanced system settings.
  2. Under User Profiles click Settings.
  3. Delete profiles named Account Unknown and profiles of users who no longer use the device. Never delete the current user's profile.

2. Clear temp folders

Remove-Item "$env:WinDir\Temp\*" -Recurse -Force -ErrorAction SilentlyContinue
Remove-Item "C:\Temp\*" -Recurse -Force -ErrorAction SilentlyContinue

3. Clear the ConfigMgr cache

Control Panel > Configuration Manager > Cache tab > Configure Settings > Delete Files > Delete persisted content.

4. Rebuild the search index (if Windows.edb is huge)

Stop-Service WSearch -Force
Remove-Item "C:\ProgramData\Microsoft\Search\Data\Applications\Windows\Windows.edb" -Force
Start-Service WSearch

5. Disk Cleanup

Run cleanmgr /sageset:1 once to tick every category, then cleanmgr /sagerun:1.

After cleanup, use Force Update in USMT Dash (click the status button in the top bar) to refresh the free-space reading.