iowabowtech
root@android:/ #
The option to mount sdcard is there, but unfortunately it does not appear to be working. I select it and it still reads mount sdcard.
That's what I was afraid of. Exit out of this cmd session altogther. Then reboot recovery. Open a new cmd prompt and then retry the options in recovery to install zip from sdcard, choose zip from sdcard. Try actually navigating to /sdcard/0 this time, then stop without selecting anything.
Now again, try adb devices command from the new cmd prompt.