I HAVE A SOLUTION!!!
Ok, go to PLAY STORE and download an app called APP MGR III
Once you've installed it, the app will tell you which of the apps installed on your phone can be moved to SD card. You select the apps you want moved, and that's about it! Also, once they actually start going to SD, you'll have to double-confirm each one's transfer. I guess that's reasonable.
IT'S AWESOMEEEEEEEEEEEE, I'M SO HAPPY! I got sick an tired of Storage full with actually having 20 GM memory on my phone. Btw, I'm using Samsung J5
Hope I was helpful!