Shucking

Seagate One Touch Desktop 8TB Portable External Hard Drive USB-C Powered
Thanks.

I know you have removed the drive now, but giving some sort of description of how you did it may help if someone else is looking to do the same.

Can find lots of guides, but not for this particular enclosure.

Did you remove the rear of the enclosure that has what looks like wavey grooves in it?

Sorry for being a PIA, it's just bugging me how you did it. :D
 
I did remove that top third, it’s plastic and held in by clips as normal.

There’s a metal piece holding the SATA connector that has to be removed, it’s held in by 4 screws and 2 pieces of tape

The smooth part is alloy and is secured by rubber feet on the bottom of the case protruding into the case and securing a frame that holds the HDD.

Pulling the rubber feet out with pliers, frees the frame and HDD.

The HDD is is secured to the frame with 4 screws covered by rubber grommets as normal.

Hope this helps.
 
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Depending on generation/model the USB C ports on the Mac Mini only deliver around 6 watt and a limited voltage spec (or 15 watt for the TB3 supporting ones) - the Seagate 8TB USB-C enclosures require 15-36 watt depending on model and usually need additional voltages the Mac Mini doesn't provide (though usually they have an additional power input). You can get USB C splitters which will pass through the data connection but separately provide power which can work in these scenarios depending a bit on the exact USB C negotiation used and configuration/capabilities of the cable.

OP stated that it's a base M4 mac mini (so the back ports are TB4), also they tried connecting the drive to an external powered dock which gave the same results so if I'm correct and there is some kind of PD chip to negotiate power requirements for the drive to function that chip is either on it's way out or something else on the board that connected the USB port to the drive was intermittent and causing the "drive not ejected properly" messages.
 

OP stated that it's a base M4 mac mini (so the back ports are TB4), also they tried connecting the drive to an external powered dock which gave the same results so if I'm correct and there is some kind of PD chip to negotiate power requirements for the drive to function that chip is either on it's way out or something else on the board that connected the USB port to the drive was intermittent and causing the "drive not ejected properly" messages.

Wasn't aware of that thread at the time of posting.
 
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