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FVE_E_FAILED_WRONG_FS
FVE_E_FAILED_WRONG_FS means the selected volume has an unsupported file system for the requested BitLocker operation. The correct remediation depends on the volume role; it is not always appropriate to reformat it.
What to verify
- Identify whether the volume is the OS volume, a fixed data volume, or removable media.
- Check the file system and volume type before choosing a migration or conversion path.
- Back up data before any file-system change because a format changes the content, not just the encryption state.
Microsoft: BitLocker planning guide
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