it took 27 minutes
Responders are acting like 27 minutes is to be expected for a spinning drive. That's ridiculous. That's two orders of magnitude worse than what it should be. A spinning drive isn't even one order of magnitude faster than an SSD (even an NVMe SSD) in real-world usage. I use an NVMe MBP, and I switched to it because of the speed. But it's not that much faster.
If it's taking 27 minutes, there's a serious problem, and whatever it is, it's far more than just a spinning disk. And IMO it's a Fusion problem until they prove otherwise.