How do I get my nextbook 8 tablet to store media on an SD card instead of NAND Flash?

[AC Question]

I use my nextbook 8 to store multiple gigabytes of acculative data, and it stores it on NAND Flash, which only has 4.52 GB of space. I would rather have this information be stored on a much larger external SD card, but my tablet stores all of it's information on Flash, and absolutely nothing on the SD card. NAND Flash keeps getting filled up and I would like to know how to make my nextbook 8 stop using NAND Flash for storage and instead use an external SD card.
Absolutely any advice you could give to solve my problem would be greatly appreciated.