The cherry on top is the strong selection of ports the Surface Book 3 comes with dual USB-A 3.1 Gen 2 ports, dual Surface Connect ports, and a USB-C 3.1 Gen 2 port for maximum peripheral connectivity.
Just like with the previous Surface Book devices, you can also fully detach the keyboard from the display and use the device as a dedicated tablet. You can get either a 13.5-inch one that has a 3000 x 2000 resolution, or a 15-inch one with a 3240 x 2160 resolution. In terms of the display, the Surface Book 3's is gorgeous. On top of this, the 10th Gen Intel CPU allows the laptop to support Wi-Fi 6, which is the latest Wi-Fi standard on the market. It can be outfitted with up to 1TB in storage space, too, which is excellent. These specs enable the Surface Book 3 to tackle any work task you can throw at it quickly, and it will also play modern games competently as well, which isn't something you can often say about hybrid devices. The Surface Book 3 is one of the most potent convertible laptops Microsoft has made, sporting up to an Intel 10th Gen i7-1065G7 processor, up to an NVIDIA GTX 1660 Ti GPU, and up to 32GB of DDR4 RAM. It has excellent read and write speeds and can be configured to have a capacity anywhere between 32GB and 1TB, so it's a very versatile card that will suit your specific needs no matter what. If you decide you want to use an SD card, we highly recommend the SanDisk Extreme Pro. Ultimately, it's a matter of deciding if you want to pay a little extra for a microSD adapter to get around the size issue of SD cards, or if you would rather save a little money and deal with the fact that an SD card will stick out.
This is easier to do since you don't need an adapter, but a regular SD card will stick out of the laptop and could catch on things. Your second option is to simply opt for an SD card. The first is to use an SD to microSD adapter to use a microSD card with your Surface Book 3 (or any other device with an SD card slot). However, it does come with a regular SD one.
As previously mentioned, the Surface Book 3 does not come with a microSD card slot.