What's the best cloud backup for images?

Episode 1476 (1:30:43)

Alan from Massachusetts
Google Photos

Alan got a new PC and he's trying to copy all his images over to it with an external hard drive. How can he back up his images to the cloud without getting duplicates? And how can he delete extra copies of his images? Leo says that there are some good "deduplication" apps that will work. But he'll run the risk of eliminating an image that is close to another but slightly different.

Leo Likes Google Photos, Amazon Prime Photos, Flickr. There's a ton of great cloud backups out there. Most are free, so why not use multiple ones?

The Chatroom says Graphic Converter on the Mac can do it. PhotoSweeper also does this.