There is a lot of misinformation surrounding Chipmixer and the owner/operator but what data was on the 7TB disk remains the biggest question. Like you I suppose it could consist of
nodes, backups, or the forensics image of the whole drive/s including free space rather than simply backing up all transactions as even then it would be hard to believe 7TB of disk space would have been taken up on it.
When was the bc1 key transition announced?PS. 7TB can be either nodes, backups, or the forensics image of the whole drive/s including free space.
I think that node data is a high probability for a majority of the data. It has been mentioned that personal data was also included, including photos. If so, this would be a large portion also. However, 7TB sounds like a figure that includes no culling. I would not be surprised at all if all private keys are included, and virtually everything related to the service such as databases. It's a big mystery at this stage as to the effect this will all have on users in the long future, which is quite a shame.