How do I move the installation folders of Steam games that have shared content to another drive?

Both Condition Zero and Condition Zero Deleted Scenes depend on the Half Life folder, as they are considered Half Life mods under the hood.

You can see it in this picture that I only have CS:CZDS installed and magically I have a Half Life folder.

But when I try to move it, I get the same error as you because CS:CZDS is installed into the Half Life folder, instead of it's own folder.

There are two possible solutions:

• You uninstall CS:CZ and CS:CZDS and install it in the target Steam folder
• You move the entire Half Life folder to the target Steam directory, uninstall the games that use the HL folder and make Steam "install" them again, this will not reinstall the games but verify the integrity of the existing files