I use this particular one. While i know its not the size, and maybe a later version, but it works great. Only complaint is it gets very hot to the touch when transferring a lot of data.
https://www.amazon.com/gp/product/B01BGTG2A0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
As for what miles pointed out, I would NOT use a microSD card. I made that mistake, when I lost everything when I attempted to do an update. While i'm sure there was a linux way to restore all that, it is just easier, safer and cheaper to get one of these tiny flash drives and keep everything everything on god's green earth on it. That's my opinion.
