Ok so probably a dumb question but I've never actually done this now that I think about it. I have a cMP 5 1 with a 120gb SSD for a boot drive running High Sierra. I want to add a 1tb HDD for more storage. my question is how does one go about setting that up? I assume I format it the same way as I did the boot drive but how will the machine know to use that drive for storage? Its probably simple but I just want to make sure I do this correctly. Thanks in advance for the help.