My phone has added an album to picture gallery called "Auto Backup" and it had something to do with Google+. I cannot delete the pictures in the folder, nor can I delete the folder itself from my phone, even though I have deleted my Google+ account. I need these photos to go away, I am sick of them. PLEASE HELP
Go to Settings --> Apps --> look for Gallery, then tap Clear data.
NOTE!! This will clear all the files in your gallery.