Galaxy Tab A default storage SD

Hello,

I have a 7-inch Samsung Tab A (SM-T280) with 8 GB of storage. I bought a 32 GB SD card, but I can't set it as the default storage. The only option I've found is to move an app to the SD card once it's installed. I did that at first, but quite a few games require 2 GB of free space to install, which I no longer have, even though I've already moved everything I could to the SD card, which still has 26 GB free.

I am full even though I have 26 GB free.

So, how can I directly install apps onto the SD card?

Thank you very much.