I noticed something odd regarding backend filenames.
I was assuming that filenames were completely random except for the prefix and extension, but it appears that the 13th “random” character of every DBLOCK and DINDEX file is always a 4!
This does not seem to be limited to any Duplicati version (DBLOCK and DINDEX files created years ago as well as recent ones have a 4 at pos.13).
There’s also no difference between used backends: in OneDrive, Local storage, WebDAV backends there’s a 4 at position 13 of every DINDEX and DBLOCK file.
Can anyone explain why this is happening?