changes in gallery samsung galaxy s5

[AC Question]

sometimes when i turn the phone on what looks like the picasso symbol has been added i dont know why also when i try do delete the picture it says unsupported file any ideas

 

[B. Diddy]

Welcome to Android Central! A Picasa icon on a thumbnail means that the picture is in your Google+ Photos/Picasa cloud album, and is synced with the Gallery. You usually can't delete a cloud photo using the Gallery app--you need to use the Photos app (the one with the pinwheel icon).