The reason for the sync state change.

| Enums ||
|---|---|
| `SYNC_STATE_CHANGE_REASON_UNSPECIFIED` | Unspecified state change reason |
| `UNUSUAL_ACTIVITY` | Sync state was changed due to unusual activity, such as potential ransomware |
| `USER_FEEDBACK_TRUE_POSITIVE` | The user provided feedback indicating that the initial sync state change may have been caused by unexpected activity |
| `USER_FEEDBACK_FALSE_POSITIVE` | The user provided feedback indicating that the initial sync state change may have been caused by a false positive |