[Q] Urgent: First day of semester and note is broke. Halp! Can't save to media topic

Whenever I try to download anything it says it failed and when I open lecture notes it says "this app needs a directory at the media/shared/external storage (SD card) to store the notebooks." I previously flashed the CM lollipop ROM for p600, but reverted back using my complete nandroid backup (every option checked and restored). What can I do to fix? This tablet is an essential tool for school for me. Thanks