Pretty certain I know the problem ut without more info, I won't know how best to fix it.

What Mac and model do you have?

What macOS?

How is your external drive connected — USB 2? 3? 3.x? Thunderbolt? Is it mechanical HDD, SATA III SSD, or m2 blade SSD?

USB-C is just a hole—need to know the protocol.


BIAB 2025 Audiophile Mac
24Core/60CoreGPU M2 MacStudioUltra/8TB/192GB Sequoia, M1 MBAir, 2012 MBP
Digital Performer11, LogicPro, Finale27/Dorico/Encore/SmartScorePro64/Notion6 /Overture5