I am in the same boat as a lot of folks. I placed a lot of photos of key significant events on My Opera and they are all lost. And I don't remember one email about the site closing , or I'd have retrieved everything. (I trawled ALL my emails a moment ago and found Nada about a closure.) As incredibly naive as it sounds, it never dawned on me for one minute that that information would just be dumped.
I tend to use Facebook now for sharing photographs with friends but as big as that company is now, the experiences I had with My Opera have made me Uber Cautious. I keep everything on an external hard drive AND an old windows XP computer.