Not used to having Steam so if I change PC or add another HDD can I just install Steam there then use TSW? Col.
Inside steam you can go to the "storage" option and add a new folder on the second drive as the destination for Steam installs to that drive. Then cut and paste the folders for the games you want to move from the steamapps/common folder on your primary drive to its counterpart on the new drive. Steam should detect all the games there the next time it runs, generating the appropriate appmanifest_****.acf files.
Thanks again for the help, I think I'm asking too many questions, I do a search but often can't find the answer so I post on here. Col.