I am planning to upgrade my 2012 iMac and will need some new fast external hard drives. I am confused between USB-C drives and Thunderbolt 3 drives. Is there any benefit to paying more for one that is designated as Thunderbolt 3? My understanding is that the 7200rpm hard drive is the limiting factor and it's not worth the extra cost. This USB-C 4TB is only $149: https://www.bhphotovideo.com/c/prod...0g05666_professional_desktop_drive_power.html But this 4TB USB-C Thunderbolt 3 is $359: https://www.bhphotovideo.com/c/prod...ogy_0g05363_professional_hard_drive_4000.html Will there be any noticeable benefit to the more expensive hard drive? Thanks!