Hi Mike, I didn't make it very clear about the speed of the Extreme, I meant in comparison to some rather old external drives I have. The size was also a factor being so small for my mobile setup.

MacBook Pro 2020 - Big Sur 11.2.3
BiaB UltraPak+ 2020 Mac, (423)
Yamaha SLG200N
Epiphone Les Paul Studio

Logic Pro X,
Xtra Styles 1 - 10. Loops-with-Style PAK 1 & 2. Multistyles PAK 1.