Jeff would like to upgrade his hard drive and RAM in his Mac Pro, and is wondering if it's okay to use third party hard drives and RAM. Leo says sure, they're essentially PCs, but occasionally one may run into issues with needing dongles or drivers. Leo recommends buying things from MacSales.com, especially RAM.
Jeff says he also doesn't see all of his RAM, and Leo says that could be due to the age of the Mac. He should check out EveryMac.com to look up details of what he can get for his model Mac Pro.
Check out Jeff's youtube channel at youtube.com/Sparks1138.