On my HTC One 801s when connected to the computer it just charges. Why am I unable to choose to select as a drive?

[AC Question]

HTC One 801s when connected to the computer just charges. Unable to choose to select as a drive

as per step 1

 

[B. Diddy]

Re: HTC One 801s when connected to the computer just charges. Unable to choose to select as a drive

Welcome to Android Central! Have you tried different cables? When you plug into the computer, do you get a USB connection notification in the notification bar? If so, swipe down and tap it, and make sure MTP is selected. (There is no USB Mass Storage option for the M7--that's for older phones.)