Depends on the person. How I did it?
Typed - because then I could could keep editing it the whole year through; every time I found more information, I could add and rearrange. It let me make super-concise notes because I could keep editing and chopping and rearranging (and the process of creating and constantly improving my notes was one of my best study methods, because reorganising and changing the information made me think about it and process it). The headings and layout was also clearer to read. The most important thing in learning content is synthesising, understanding and linking into a big picture, so keeping drawing little bits from different sources and building it into one coherent concise picture over the whole year is like THE BEST study method. That's why I typed.
But when trying to memorise/rote-learn, I handwrote simply to help my recall - but I instantly trashed the notes, as I wasn't writing them to study off, but to help memorisation.