...and so what’s the best use for the Highpoint Card? For a boot drive or a media/files and folders drive? I’m reading that it’s a waste putting a boot drive on there...
It depends on your needs or wants. It boots faster than an Apple SSUBX drive, and as @tsialex says, it has 4 drive slots so you can literally use it for everything. I hate using anything connected to my slow SATA2 ports. Dramatic difference.