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I’m experiencing the same issue with my Mac mini M4 and an 18TB USB-3 external HDD (in a third-party enclosure). Playback freezes intermittently.
Some replies here suggest this is ‘user error,’ but it’s a real hardware/driver compatibility problem. This isn’t just ‘buffering’—it’s a systemic issue with high-capacity HDDs on M4 Macs. If others have found a working fix (e.g., specific enclosures/drivers), please share!
 
"I’m experiencing the same issue with my Mac mini M4 and an 18TB USB-3 external HDD (in a third-party enclosure). Playback freezes intermittently."

Have you tried copying the video to the Mini's INTERNAL SSD first?
And then play it from there?
If not, try it.
THEN get back to us.
 
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