Htc one m8 usb connection dont show all files

Hi guys, today i decide to backup my files from my HTC One M8 and do a factory reset, but when i connect the phone to the computer ( i try windows and mac and the result is the same ), i can't access to folders like WhatsApp, DCIM and many other but i see only a few part of real files that i have in it...I need to backup all photos/videos to my pc, but I cant access to the most important folders. I use HTC One m8 with latest update that is Marshmallow, change the usb ( that originally was "charging" ) to MTP, PTP and others but i cant see any photo in my PC...Thank you very much guys, how can i solve this problem that i think is a problem of permissions but i dont know how i can do it...Thnx very much people

from Android Forums at AndroidCentral.com - Ask a Question http://ift.tt/292CXQM
via IFTTT