We understand your concerns. However, please note that we cannot remotely access or operate your NAS without your authorization and an established remote connection. We did not perform any operations to delete your data.
To help us investigate what happened, could you please describe the steps you took during the TOS 6 to TOS 7 upgrade, the permission issue you encountered, and the exact steps you followed when reinstalling TOS 6? We will review the details and do our best to identify the possible cause of the data loss.
Thank you for your cooperation.

