Are you asking if an external MicroSD can be formatted and assigned as the primary storage of your Razer Edge? Ensure to use a Class 10 microSD (up to 2TB).

I am trying to use a micro sd card for apps and other files that may require more space than the internal storage. I have a Samsung Pro plus card (class 10 card) and I can’t move any app files (or download directly to the card). It only shows it as portable storage with no option to change it. 

Thanks for clearing that up. The relevant team is aware that many users are requesting this, and we understand the need to have this option enabled. We appreciate your patience while we’re looking into it. Also, there are no guarantees when this be added to the device’s feature yet. Thanks for understanding.

Well about "we're looking into it" you guy are not there is not such a project that you guy looking into it, that why you mentioned "there are not guarantees when this be added" is just not something in their priority to do so.  This options was intentionally removed, since this is a tablet has function of a tsblet modified enough to be smaller and compact. Intentionally was removed it becuase in base is always enabled but was removed maybe was intented to sell different like apple storage upgrades so it was disabled and how to know becuase mostly all phone are not showing this option, use microsd as internal and there was option in development options where it was able to force to write and install on microsd but weird its not even there so was intentionally removed perhaps a little conversation with a team member  met in real life, only this can be done doing root

This is a problem with higher versions of ANDROID, I think from V8 onwards.

How long will it be before you fix the storage problem for the razer edge? There's not enough space on the main drive to Update Games. I keep getting insufficient storage. As it is now I can't even sell this because this is a failed product.