Use USB 3.0 hub and set up a RAM drive....
https://www.youtube.com/watch?v=B8CxfvRpUjU
Needless to say, you do not buy Surface tablets for upgradeability/repairability.
Does anybody know if the RAM can be upgraded on the Surface Pro 4? Or is it soldered on to the motherboard?
And along the same vein, can you upgrade/replace the SSD, or does it use an embedded eMMC type disk?