It doesn't work like that, unfortunately. You can't use your SD as extensions of your device storage capacity, it can store just "your" files (as photos, musics

It doesn't work like that, unfortunately. You can't use your SD as extensions of your device storage capacity, it can store just "your" files (as photos, musics, videos etc). You still need device capacity to install apps and apps use device to store things like cache. You can move some of that to SD, but not everything. You'll end up with zero phone capacity and a pretty empty SD.