Hi all, I just came across this. My scenario is a bit different in that it appears as I believe I was synchronizing my pinboards.
It appears that went to remove Opera browser from a computer I was giving back to someone, I cleared all site information on that computer and it synchronized that clearing across to my main machine as well, which was logged out at the time.
That was a couple months ago, and I just noticed the missing pinboards now.
Luckily, I have a backup of my whole computer from Oct 2022, and after hours of scouring it, it seems the pinboard content is stored in the IndexedDB folder under pinboard.opera.com.
Steps to restore were:
- Shut down opera
- Go to the backup of IndexedDB/pinboard.opera.com* (2 of them)
- Copy those 2 folders into the current IndexedDB/pinboard.opera.com*
- restart opera
Voila, got my pinboards back.
I'll be backing this folder up regularly now.