Android keep saying "SD Card is mounted, do you want to change your default storage"
do u still have this problem.? Did you get solution for this.? 

If yes, just share how you solved it. 

If no, then this following FAQ page 21th question will help you to find the solution. 

They have said try to update your Link2SD app. That will solve your problem. 

http://www.link2sd.info/faq