How can i fix the insufficient memory error

[AC Question]

I recently bought a ZTE Imperial max through US Cellular that has 16gb built in storage and every time I try to download apps it says insufficient memory on device I've already tried to download a cache cleaner app it won't let me I've got a 64gb SD card I've already moved the apps I already had to my SD card also i would love to know how I can fix this???? Please help

 

[Tim1954]

16 Gig isn't much on modern devices. Have you checked the memory to see how much the OS is using?
With apps, you really only move a fraction of the app to sd card, the guts remains on the main memory, so you don't save much there. Better moving media over...