@leocg Well, I did resync and still I cannot acces my old data. They seem as a data from another device. It shows that I'm logged in 2 devices, one is the new formatted PC and the other is the same PC before the format. Is there a way to implement the sync data to my new formatted device?

@leocg Gone from Sync. I was expecting them to be gone from my computer but not from Sync.

I've formatted my PC and redownloaded Opera to my computer. To not loose any pinboards and open tabs in a situation like this I've been using my Opera account for a time and it worked before. But this time when I signed in my account in the browser after the format I all my info has been deleted. I saw them in the blink of an eye but after that thay just vanished in front of my eyes. Is there a way to recover them? If so how?