So what happens when you save a picture jpg file? Where does it get saved to? You might just want to change the storage location by going into your user folder and change the location for pictures, downloads, documents, etc. This is what I do anyway and really is the way you should do it.
For example, to move the location of your pictures folder, right click on pictures in your user folder and click on properties, then click on the location tab. Change the location from C to K and it will automatically move existing pictures from C to K in the pictures folder.
The problem when installing apps/games is that the default installation that the program offers is C drive but will usually give you the option to change install director before actually installing the app. The app isn't gonna know to check windows settings to check where to install the program.