Can't free up iPhone storage, says 6.4 GB of photos but there only 49 photos?

The bar at the bottom of iTunes displaying my iPhones storage says that photos are taking up 6.4GB but I have unsynced photos (i.e. Unchecked the sync photos box) from my mac. And on the photos app on my phone I only have 40 pictures from the camera, yet its taking up all that space.

I've tried restarting the phone and even wiping it and restoring from backup, but can't free up that 6.4 gb of hidden photos.

Anyone have any idea?

Check your photo stream.

Maybe some are vaulted or hidden delete a vault app if you have any or format your phone