To all who experience the annoying nag screen update. Here's the quick and tested bypass:
Just install this xposed module:
and also here's the work-around bypass of sk...
After flashing CM12.1 my internal storage only shows 4gb of total space. The phone originally came with 8gb of internal storage, and is just after I did this that it was reduced. I did clean up all the Dalvik cache, I also tried doing a new factor...