In different applications you can choose the destination folder for downloads or installations. Browsers, P2P for downloads. For heavy softwares and videogames you have to choose a different directory than default.
What I recommend:
1. Make folders for Documents, Pictures, Music, Videos in the HDD and replace the default locations with these. Folder properties>location>add new location>select and apply.
2. Make a Downloads folder in the HDD and set it in the configurations of the apps that usually download content from the net.
3. Make a folder for heavy stuffs like software and videogames in the HDD so you have room in the SSD for the OS and light apps of common use, like browsers, mediaplayers and the like. (since you have only 60 gbs and the OS takes most of the room with the base installation and updates)