When connecting my Nexus 7 to my Windows 7 computer, it doesn't show up in neither Windows Explorer > My Computer
nor Device Manager > Portable Devices
.
I did, however, install the Google USB driver, which allows USB debugging for Android development, and that driver shows up under Device Manager > Android Devices
Also, when the Nexus 7 is connected via USB to the Windows 7 Computer, the setting on the device is correctly selected/checked to connect as a media device: Notifications (Swipe down) > USB Computer Connection > Connect as Media Device (MTP)
However, when I connect my Galaxy Nexus phone, it shows up in both Device Manager > Android Devices
and Device Manager > Portable Devices
, which in turn shows up under Windows Explorer > My Computer
allowing me to actually use it as an MTP device.
How can I access my Nexus 7 as a media device under Windows 7?
Best Answer
As I posted in this question on Android.SE, I was able to get my MTP mode working again. FYI I don't know how this affects the debugging interface since I haven't checked that out yet, but this should let you access it as a drive.
From that answer (slightly modified based on your images):