
For either type of install, consult your owner’s manual for how to remove an existing drive (if necessary), and how to handle the cables. Then, use an available SATA power cable coming from your system’s power supply and connect the cable to your Crucial SSD. Games can be huge, and need to be swapped between drives / uninstalled, no two ways about that. Attach the other end of the SATA cable to your Crucial SSD.

though they can be moved to the HDD is desired. That said, photo collections load faster off an SSD. I suppose if one took 10,000 screenshots in Steam games, the Steam Userdata folder would eventually get quite large due to the jpgs. Likewise Thunderbird profiles, Outlook data files, etc end up in Appdata by default rather than the program installation directory (unless you use portable Thunderbird, obvs) However, things like save games almost always live in the Documents or Appdata folder rather than the steam userdata folder or the Steam game installation folder - so it wouldn't matter much where one had installed Steam anyway. If you leave 10gb of Fallout 4 save files in your appdata folder, or 100gb of uncut Shadowplay recordings, space suffers.

My 1TB SSD gets quite full when I get lazy but that's exclusively down to not being bothered to moving games or saved video files/save games off there. But there are other, better ways to manage space

I certainly agree that it's wise to manage space, and that reinstalling Windows can be a faff (I haven't done a clean install since mid-2016, and I'm well overdue one).
