I just downloaded the Google Photos Backup App to upload my photos. Like many, I used to use iPhoto but have now moved to Photos (hence have an iPhoto Library Database and a Photos Library database). I know that the photos are not really duplicated (just connected via links), even though there are two libraries. The Google Photos Backup App only has options to Backup iPhoto (as well as your Pictures Folder by default), there is no option to select your Photos Library Database. I originally selected to backup both my iPhoto Library as well as my Pictures Folder and it seemed to be correctly pickup all my photos (around 14,000). I let the app run overnight and came back to see that there were not 28,000 pictures to upload (so it seems to be duplicating my photos). I deselected my iPhoto Library, and it has now dropped back to 14,000 photos. Does anyone know if this is correct? By just selecting the Pictures Folder is it backing up my Photos Library (and not the iPhoto Library?) even though both libraries are stored in the Pictures Folder. It should not be an issue provided I don't make further changes to my iPhoto Library, but wanted to know if this is correct. Thanks for your help!