I wouldn't say that, it's just that I don't have a lot of data about this particular case to go on. In some cases if you overwrite our index files, you can get something that's known as a Safety Freeze. Again - I have no idea what happened with this customer, but I would venture to guess that since this occurred on their C: drive, something similar to what causes a Safety Freeze (https://help.backblaze.com/hc/en-us/articles/217666178-Safet... happened here, and they needed to re-upload the data (in most cases, previously uploaded data is still available for restore - but with 13TB of data to re-upload and not a lot of bandwidth, it would have taken them way longer than our 30-day history to do that).