Not sure if this has been posted before but you can now move Gear VR apps to SD card, freeing up tons of space, here's how. This also allows ALL apps to
Installing apps on SD card. Just to let you know : r/GearVR
Gear VR with Controller | SM-R325NZVAXFA | Samsung Africa
External Storage Solutions for the Gear VR, Testing the Micro USB Headset Port - YouTube