Bubbee wrote:
I lost most of my Picasa's when I switched to PSE18. I did have several that had been uploaded to Google Photos and, thank goodness, I had made DVD's and print albums and prints. I'm now becoming a backup bug, making flash drives, print albums, and Dropbox.
As has been said elsewhere, Picasa doesn't store photos. It's just an editor. Your photos are still on your hard drive where ever you put them originally.