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<blockquote data-quote="MacInWin" data-source="post: 1905791" data-attributes="member: 396914">Yes, I have 10 of them running on my M1 MBP, so it's not something inherent in the Mac or macOS. Mine are a mix of Seagate, WD and Samsung, both rotating and SSD. No problems. But I have powered hubs and powered drives, so none of them are depending on the MBP for power through a hub. The OS is involved here. TM designates drives as TM, even when TM is disabled. But if that drive is mounting, I would say it's OK. The other one is more problematic. I would try it on the Air, and if its working there it could be the ports on your M1 system have gone wonky. An SMC reset would normally be in order, but on an M1 Mac all that really means is to power it off, unplug it for a couple of minutes, plug it back in and restart. The SMC is reset with every power off. What model is the M1? You did not say. And what version of macOS is on it? The most recent is 12.2.1.</blockquote>

[QUOTE="MacInWin, post: 1905791, member: 396914"] Yes, I have 10 of them running on my M1 MBP, so it's not something inherent in the Mac or macOS. Mine are a mix of Seagate, WD and Samsung, both rotating and SSD. No problems. But I have powered hubs and powered drives, so none of them are depending on the MBP for power through a hub. The OS is involved here. TM designates drives as TM, even when TM is disabled. But if that drive is mounting, I would say it's OK. The other one is more problematic. I would try it on the Air, and if its working there it could be the ports on your M1 system have gone wonky. An SMC reset would normally be in order, but on an M1 Mac all that really means is to power it off, unplug it for a couple of minutes, plug it back in and restart. The SMC is reset with every power off. What model is the M1? You did not say. And what version of macOS is on it? The most recent is 12.2.1. [/QUOTE]

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