Google Photos Backup creates large Pictures/GPBackup folder I installed Google Photos Backups on OSX (Mavericks).  It created a /Users/rob/Pictures/GPBackup folder that is 10 gig in size, and it looks like it has copies of all my photos and movies.  I don't want it to use all this space, but didn't see any configuration settings for this.  What is the purpose of this folder?  If I just delete it, will Google Photos Backup continue to work?
If you click the "Google Photos Backup" icon in your menu bar (looks like a gray pinwheel), you should see the "Preferences" option.  Clicking this will open the preferences window.  There you should see a checkbox for "Also copy photos/videos from external media to" (See image below).  Uncheck this box and you shouldn't have the extra backups anymore.