How can I upload my images to Google Photos?

Episode 1345 (1:51:50)

David from Mission Viejo, CA

David has about 20,000 photos in Apple Aperture. What's the best way for him to upload them to Google Photos? He tried the Google Photos uploader, but it won't work. Leo says that Google Photos may have trouble finding them. He should look for a folder called "Original Photos" and make a copy of it. Then he can point the uploader to that copy.

Is there an app that can identify duplicates in Google Photos? Leo says he doesn't know of one, but there are plenty of de-dupe apps that can do it before he uploads.