One thing I've been doing since before the WWW even existed -- literally back 25 years with FidoNet, etc. -- is I always, reflexively copy a post before I push "Post" or "Submit" or whatever they call it. Once you get in the habit, it's a hard one to break. It has saved my life hundreds of times -- probably a dozen times just on this site.
Sequence on a PC for any vBulletin Forum:
Ctrl+End
Shift+Ctrl+Home
Ctrl+C
Now post is copied, so if you run into any trouble, open a text file and dump it in der -- you're covered. Internet can go out at any time.
Rick