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usmt-dash/Documentation/Device Storage Remediation.md
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[[Yellow:Remediation]]
# 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
```powershell
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)
```powershell
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.