381 is a read-only storage result. The local Windows en-US message table describes this value as: “The cloud operation is not supported on a read-only volume.”
Code reference and safe checks
Read the exact screen and operation before selecting a repair. This page does not run commands or collect files, keys or logs.
What this value means
The local Windows en-US message table describes this value as: “The cloud operation is not supported on a read-only volume.”
ERROR_CLOUD_FILE_READ_ONLY_VOLUME is a Win32 system result, usually returned to an application or API caller. It is not a Windows blue-screen code or a diagnosis of the whole PC.
| Code | 381 |
|---|---|
| Hex form | 0x17D |
| Symbol | ERROR_CLOUD_FILE_READ_ONLY_VOLUME |
| Windows family | Win32 system codes |
| Source level | Windows en-US message resource |
Safe next steps
- For 381 (ERROR_CLOUD_FILE_READ_ONLY_VOLUME), check whether the target media or volume is intentionally read-only, write-protected or locked by policy.
- Use the drive or device maker’s supported instructions and confirm you selected the correct destination before changing its write state.
- If the device unexpectedly became read-only or holds needed files, preserve data and investigate its health first.
After one step, repeat the original operation and record whether this same code returns. A different code needs a fresh interpretation.
What this code cannot prove
This wording came from the local Windows en-US system message table. The symbolic name is from the source dataset’s historical Boost mapping; a matching current Microsoft web pair was not found in the checked lists. Verify the exact number and applicability on the affected device.
Stop repeated write-heavy scans or repairs if the drive drops offline or important data is not backed up.
Official reference and verification
Source type: Windows en-US message resource. Checked against the source set on Nov 2, 2026.
The reference gives the meaning of this identifier. It does not inspect your PC or guarantee that one repair will work.