ähmm, a note: low amount of free disc space is in special for SSDs a problem. Therefore exist mechanism like “over provisioning” etc.
@FriendOfJah … more content in an update also mean more used disc-space. So may be you should think about a bigger ssd. A cleanup can may be also help, e.g. uninstall content in content manager you not need. May also reduce rolling-cache-size to “normal size” if you have increased that, etc. ( but the normal default place for rolling-cache is the %AppData%\Micro… folder, so not the second SSD ).