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and

 
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For me actually all of this has stopped when I updated Google Drive to the latest version.
 
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Reformatting, installing from scratch, and never having ANYTHING made by or even peripherally related to Google ever come anywhere near the machine solved my similar issues.
 
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It's definitely a network drive issue. Accessing a network share is immediate doom.
 
I have a similar problem on my M1 iMac 24-inch - I use Synology NAS, how I can disconnect it. When I eject it connects back automatically.?
 
I have had some serious network drive slowdowns this week and it was awful moving files around this morning. This morning, I went to every system and turned off indexing on all drives, including network drives, on my systems and this has brought things back. I had added another system to my setup and I suspect that it started indexing my network drives which resulted in killing my NAS performance.
 
Update about crashing iMac.

Seems to @Amigalander is right and is the issue with communication with the Synology NAS.

Unmounting and disconnection on iMac didn't solve the issue.

I've tried to disable SMB and still experienced freezing.

Disebeled AFP still the same.

At the moment I have to completely turn off the NAS drive and shut it down. From 3 days iMac works fine.

Wierd.

Any ideas on how to fix the communication between macOS and Synology NAS?
 
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