Default [Q]Cannot Mount /sdcard - [sgh-497]

I am trying to root my AT&T galaxy tab 10.1 and Whenever I try to flash supersu from CWM it cannot mount the sdcard or any location in the mounts and storage section. I have tried it with both CWM and TWRP recoveries as well as rooting through ODIN, which looks successful but is not rooted when I boot back up. Any Suggestions?