I don’t believe it’s possible. I think it’s all the main storage/Downloads, and no other option.

Been wrong before though.

I bought one a couple of months ago. I think it’s fantastic both for the size and the price. It’s a bit too small of a screen for my aging eyes, but otherwise it works great. I’m keeping it to or when I travel or other good use. Edit: the cameras are… OK. Nothing great, but serviceable. Gcam helps, Google for versions. Also, yes, you can root it. Also GSI flash works, but you lose functions. The battery charges super fast, given it’s size. It accepts like 10w charging current.

I can tell you that it works fine using T-Mobile. It picks up the same bands as my LG V60 (with 5g turned off). I can’t speak about any other carrier, though.

Jelly Star is rootable and there are GSI roms that will run. Just FYI.