Why I insert an SD Card and downloading game not working.

Please help RCA Support,I need you to fix this.I inserted an SD Card in the tablet.I didn't download any games on the sd.all game were download into internal storage.I changed the write disk to sd card and then when i try download a game.it wont work its say insufficient storage consider deleting app.i dont want to delete my precious app.sen a technician over here to 256.N Murray St,Banning CA 92220.consider sending to my account which is michaeltrang33@yahoo.com send over a professional. I cant send to RCA manually.I dont know where you guys are.if you help i would be much oblige.This model is a 7 Yoyager without Keyboard.I cant update or install important things.HELP!