Why can't I delete photos from my Note 4 Gallery app?

[AC Question]

why i cannot delete photos note 4 gallery app?

The photos are marked with a icon in lower left corner. The screen message show "unable to delete"

 

[B. Diddy]

Re: why i cannot delete photos note 4 gallery app?

Welcome to Android Central! Is it the Picasa or Google+ Photos icon? The former looks like a multi-colored camera shutter, while the latter looks like a pinwheel. If so, that means the photo is in your Google+ Photos cloud album. You often can't delete cloud photos using the stock Gallery app, but you can with the Photos app. Or you could go to your Google+ Photos on your computer browser, select Albums, and find those photos in your Auto Backup album.