Your Surface Book 2 has a full-size SDXC reader, which is great if you’re taking photos from a DSLR or something, but for many other devices, a microSD card is what works. Plus, you can often pop microSD cards into your Android devices, making them a more convenient choice. These are the best microSD cards (and adapters) for your Surface Book 2.
Best truncated adapter
BaseQi microSD adapter
A full-size SD card adapter would be sticking out of your Surface Book, which might be fine for some folks, but if you plan on leaving it there all the time, it may get snagged. This adapter has a narrower profile, allowing you to pop in your microSD card and leave it there without the worry of it getting ripped out by accident.
Bang for your buck
Samsung EVO Select 128GB
Samsung’s EVO Select microSD cards boast wicked fast read and write speeds of up to 100MB/s and 90MB/s, respectively, and they even come with a full-size adapter. These Class 10 UHS 3 cards can handle 4K video and hi-res photos, which makes them perfect for your Surface Book 2. Samsung also offers a 10-year warranty.
via windowscentral https://www.windowscentral.com/best-microsd-expansion-cards-surface-book