Looking to get either a Mac mini or iMac. Currently have 2010 Mac Pro with four 3.5" drives that I need to move to an external enclosure. I'm currently looking at these two: OWC Mercury Elite Pro Quad USB 3.1 Gen 2 https://eshop.macsales.com/shop/owc-mercury-elite-pro-quad/raid-ready OWC ThunderBay 4 Thunderbolt 3 https://eshop.macsales.com/shop/thunderbay-4/thunderbolt-3 For the time being I will: - Keep my current 3.5" spinning drives - Setup enclosure to JBOD - no RAID Can someone correct me on the following: Even though USB 3.1 Gen 2 is slower than Thunderbolt 3, using 3.5" drives in JBOD config, I still won't see any slowdowns in transfer speeds? Even most SATA SSD drives won't max out the USB 3.1 Gen 2 in the OWC Mercury Elite Pro Quad correct? (drives setup as JBOD) Only if I decided to go to RAID, then the Thunderbolt version would be a better choice? If I need to have legacy connection support, I need to go with the OWC Mercury Elite Pro Quad, since that will work with USB 2 connections correct? There is no way to use Thunderbolt on legacy machines? Thanks!