Why isn't the *#9900# trick not working?

[AC Question]

I got a new phone and its a android version 4.4(yes i know its old) and it keeps saying "insaficient storage." All my appd are on my sd card so i tried the *#9900# trick and its not doing anything, any advice?

 

[belodion]

What trick is that?

 

[RoneQii]

Its to clear the dumpstate but if i type in the code (*#9900#) it's not doing anything.