Hi @JeffL,
So I was testing both: Thunderbird IMAP folder synced to odrive as well as second option (you proposed) - backup.
I like the backup i.e. the fact that it does not happen real time but once a day.
But…
I have now backed up all files that changed with multiple instances - every time file changes backup will create new copy. That is fine for normal files but for email files I am not 100% - when it comes to recovering the entire IMAP structure it might be a bit tricky to find which file is the right one.
On the other side: perfect backup.
I am still not decided which approach is better. 