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User profile for user: Jotek
Jotek Author
User level: Level 1
16 points

Mac Mini M4 Pro - external drives become disconnected with no reason

Have a serious problem with external SSD and HD drives. They were perfectly working with iMac Pro and MacMini 2018. Now being constantly disconnected on MacMini M4 Pro.

Does not matter if connected with USB-C cable or Thunderbolt. I've used branded high quality cables - and cheaper - the effect is the same.

Did use various of external drives from branded exclosures with 2.5 HD up to Lacie and Samsung SSD. All becomes disconnected once I double click on the disk icon in finder or in Sidebar in Finder window.

After w while the disk is coming back and can open it and see its content... however if I will leave it untouched for another moment then open any folder in it or click on the disk icon... the disk becomes disconnected.

Mac mini, macOS 15.2

Posted on Jan 17, 2025 2:40 PM

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5 replies
User profile for user: Jotek
Jotek Author
User level: Level 1
16 points

Jan 18, 2025 4:14 AM in response to Jotek

I did not mention about waking it up from sleep mode but regular usage. Just doing something in a web browser or another application, then want to open something from disk and it disappears with a message "Disk Not Ejected Properly, then coming back... can make some operations on it. When it is left for a few minutes... situation is perfectly repetitive.

Disk disappears even if I have the file open in application.

Discs I did try were directly connected to the MacMini

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Mac Mini M4 Pro - external drives become disconnected with no reason

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