I'm not sure what you mean, but if you're running low on internal storage, here's what I did for a fix:
First, apply one of the myriad of options for allowing any app to read/write the external SD.
Get the xinternalsd xposed module.
Tell it to make everything point to the external uSD card.
Then move everything from the internal emulated SD card to the external.
That will probably clear up a ton of space.
If you're still running low, clean up the app caches. If you really have 4GB of apps and data on internal storage, 1GB is probably caches.