Sadly this model has soldered RAM and is not expandable.

The four orange outlined chips are the RAM chips.

Here is the 2017 model which has both a socketed CPU and RAM

In any case you might find upgrading your drive to a faster model (SATA) and if your system has a PCIe slot then you could also install a larger Blade SSD (the line of solder pads just to the right of the Ethernet RJ45 connector is where it would be).