I would like to use a Google service. As far I know Google has three photo related services. I am a little bit confused which service should I use to:upload all my photos and keep original resolutionshare with my family selected set of photos occasionally make automatic enhancements    I am not asking what is the best photo sharing service. I would like to know what is the difference between Google Picasa and G+ Photos, how they are related to Google Drive. 
15 GB of photos. Should I use Google Drive, G+ Photos or Google Picasa?
photos;backup;photo sharing
Picasa Web is going away and is being replaced by Google+ Photos. (In fact, if you go to your Google+ photos and to Picasa Web, you'll see that your photos are all in both places.) Furthermore, I wouldn't expect to see too many more updates to the Picasa desktop application. Google doesn't want to be making desktop apps anymore.)Further, since Gmail, Google Drive, and Google+ Photos now all share 15GB of space, it really wouldn't matter where you upload them to, because they'll all be using the same storage.Therefore, I'd say that you will want to use the tool that's specifically for images: Google+ Photos.If you currently have 15GB of photos, you'll want to purchase some extra storage.