Re: You can update system with small SSD by using a external drive during update.
You can also clear up a lot of disk space by running Disk Cleanup as Admin and ticking every box, this will remove old Windows & driver update files, and can save many GB of space.
Alternatively, clean the hard drive off the motherboard will also save plenty of internal space and frustration time.
Joke(?) aside. If you need even one additional storage media, you are better off just moving the data off the internal drive and do a clean reinstall, which will have few Windows problems overall.