External SSD keeps disconnecting after upgrading to Sonoma

Same issue MacBook Pro MP1 running Sonoma 14.2. I thought it was issue with my Samsung T7 Shield 4Gb SSD (which did die once and was replaced by Samsung), but the second unit had this issue over night when the computer would go into standby. Sent the second T7 back and Samsung reported nothing wrong with it. I noticed the same issue happening with a Seagate 5Gb HD. I've gone through settings to basically keep the computer nearly fully-on at all times and never let drives go to standby... still happens. For sure seems like a Sonoma issue.

As I said to someone else, please make sure to leave a report about it on feedbackassistant.apple.com and even maybe contact Apple Support Live Chat and tell them about your problem!

This is the only way and chance of this bug / problem ever being addressed and fixed!

Many people need to report it, so Apple will see this.

Please report it!!! 🙏😞

To add, there is a Reddit thread on the same issue and an interesting comment claiming Apple is aware of the issue and is suggesting to wait for a fix. Which is probably good news.

hi! I bought a new enclosure and new m.2 ssd this weekend. Tried getting it to work with my Sonoma machine, didn't work. Plugged it into my Monterey machine, zero problems. It's a Sonoma issue...

Same issue here. Last night upgraded to Sonoma. After the upgrade my external drive keeps disconnecting.

EXACTLY, it's all about the money. They live from harware.

Update: I have not observed the disconnect problem since I upgraded to Sonoma 14.4.1. Has anyone else using that version seen the disconnect problem?

I understand why you might ask that question, but I have experienced the same issue with the very hardware that Apple sells instore, although I bought it elsewhere.

Has anyone every check in the SMART status, if the drive also logs these unsafe shutdowns? AFAIR SMART should do that. Would be nice to check this. My drive doesn't support SMART unfortunately.

Also, I just made and sent a detailed report like the original post author said, and hopefully Apple will react to this problem.

the link to your feedback to apple does not work.

Also, the link to his feedback doesn't work because those reports are "tied" I think with one's Apple ID...so they cannot be made public, I think.

Here you can see mine:

Just make sure to include as much details as possible and submit it. Please! :) Your report is really helping me, and you, and everyone with this bug / problem! Thank you!

It may be a Mac hardware issue. I had the same thing happening 20 times a day on Monterey. It corrupted data on my external disks, fried one of them irrevocably. Apple eventually acknowledged there was an issue with the Thunderbolt ports and replaced them. Problem solved... until 3 months later when it started to come back. Rinse and repeat. Only this time Apple insisted it wasn't the ports, didn't replace them. They say it's a 'software issue' (I disagree), wiped my internal SSD and installed Ventura.

Only had it back one day, still getting to set up, haven't even installed most s/w let alone used it and ... Here we go again.

It could also be the drive accessory (not cable) you're using for IO between your laptop in the drive, for instance a Sabrent NVME enclosure.

(if you have been using it for a while) Maybe some FS issue or it could be disk has been used a lot and is reaching its lifespan, you can use some utility to check its life.

There is also a possibility the drive is dead, it happens even with new ones from time to time, you can check this by wiping it on some other device with a FAT partition and trying to use it. If possible.

It could be many things, so it's up to you to figure it for the most part. I just said what I think could help you!