Hey there, @Jeremy Smith!
The best way to do that would be to clean install all the games and software onto the new HDD as this would avoid any potential errors while loading the programs. This procedure will ensure that you won't face any sort of issues when launching the games.
However, if that is not an option, I'd try the cloning procedure as
copy/pasting won't work for software utilities. If you are using Steam or other gaming platforms, check their knowledge base as it could have some helpful tutorials about
moving the installation and games. As for the cloning procedure, make sure you choose a software tool that allows you to manually select what gets transferred to the new HDD.
I'd also strongly recommend you perform a full backup of your RAID configuration and precious data somewhere off-site before you proceed tampering with the storage setup. This is the surest way to avoid any potential data loss in the process.
Hope this helps you! Good luck!

SuperSoph_WD