I looked into the 7z.
Due to okteta not liking files bigger than 1GB, I split the .aa into 10 further parts.
I took a look at the 7z archive format (
https://py7zr.readthedocs.io/en/latest/archive_format.html) and opened up the first 1GB in okteta to see what was up.
The signature header says that the "next header offset" (pointer to the next header, which seems to indicate where the files are in the 7z) is 38677398667... which is... 36GB into the file????
So uh... we have to wait until all 4 parts are uploaded to even see what the fuck is in this, it seems.