Spectrasonics does not distribute Keyscape via Steam. Any "download" claiming to offer Keyscape through a Steam folder is illegal piracy. This article does not endorse, support, or provide instructions for cracked software. Piracy harms developers and often leads to malware, keyloggers, and corrupted samples.
If you have downloaded the Keyscape data and need to link it manually: Locate or Create the STEAM Folder keyscape steam folder download reddit
Here is a direct excerpt from a moderator post (edited for clarity): Spectrasonics does not distribute Keyscape via Steam