How much free hard drive space do you need nowadays to keep things running well on an SSD? I’ll be running tight on space on these drives, so I don’t want to gimp performance. I know SSD’s, to run optimally, need space to move bits around but on a boot drive with windows - exactly how much space does one need to keep free?
Whatever drive you end up buying, plan on using only about 75% of its capacity if you want a good balance between performance consistency and capacity.