Where these folders coming from and unknown notification sound with no notification

[Android Central Question]

I started to have this weird notofication sound on an hourly basis and no notification. And i have noticed a lot of new folders (i mean 100s of them) with names like "16858382944382" and "PANO_737473_8584".

MAKES ME FEEL LIKE I HAVE SOME KIND OF A VIRUS OR SOMETHING

 

[B. Diddy]

Welcome to Android Central! Which phone? Is the notification precisely an hour apart, or is it just approximate? Does it go away if you turn off NFC?

Where do you see these folders? "PANO" could be related to panoramic shots taken with the camera -- have you been doing that lately?