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.

Tim
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Mojave 10.14.6, iMac 4K, Logic Pro X, BiaB UltraPak 2019 Mac, Native Instruments A61.

Catalina 10.15, MacBook Air, Logic Pro X, BiaB Ultrapak 2019 Mac, Arturia Keystep.