External SSD corrupting after after upgrading to Sonoma.

I have a Crucial S6 external 2tb ssd that’s formatted to exfat (have to use between iMac and Windows).

Since upgrading to Sonoma a week ago, every now and then my ssd gets corrupted. I always make sure it’s ejected properly but it has happened on more than 2 or 3 occasions. I can’t repair using Disk Utility (file system repair failed -69845). Luckily Windows repairs it fairly quickly.

It also reads verryyyy slow. This was never an issue with Ventura and it was read almost immediately.


Does anyone why this is happening? Is there a fix?

iMac 24″, macOS 14.0

Posted on Oct 13, 2023 12:33 AM

Reply
Question marked as Apple recommended

I have several Crucial external SSD, but none is formatted as ExFAT. They have all been working fine with Sonoma.

I suggest that you copy the contents of the SSD to some other drive, then reformat the drive as ExFAT, since that is what you need. It is probably better to format in the Mac, apparently (this is what I have gather from several previous discussions, though I never had to deal with this back and forth between mac and pc).

Posted on Oct 13, 2023 2:30 AM

2 replies
Question marked as Helpful

Oct 25, 2023 8:26 AM in response to Josesuarez3

Here's my recent scary experience: My external hard drives, mechanical, have failed to mount on my Mac since I upgraded to Sonoma. My drives were formatted in exFAT. I think lots of people are seeing this same problem. Had to use EaseUS software to get into the unmounted drives so I could copy files. I'm now reformatting all my external drives to APFS.


I see you are needing something like exFAT so the drive can communicate with both PC and Mac, so I'm not sure what the answer would be. But just want to let you know that Sonoma is showing problems with exFAT drives.

6 replies
Question marked as Apple recommended

Oct 13, 2023 2:30 AM in response to Josesuarez3

I have several Crucial external SSD, but none is formatted as ExFAT. They have all been working fine with Sonoma.

I suggest that you copy the contents of the SSD to some other drive, then reformat the drive as ExFAT, since that is what you need. It is probably better to format in the Mac, apparently (this is what I have gather from several previous discussions, though I never had to deal with this back and forth between mac and pc).

Question marked as Helpful

Oct 25, 2023 8:26 AM in response to Josesuarez3

Here's my recent scary experience: My external hard drives, mechanical, have failed to mount on my Mac since I upgraded to Sonoma. My drives were formatted in exFAT. I think lots of people are seeing this same problem. Had to use EaseUS software to get into the unmounted drives so I could copy files. I'm now reformatting all my external drives to APFS.


I see you are needing something like exFAT so the drive can communicate with both PC and Mac, so I'm not sure what the answer would be. But just want to let you know that Sonoma is showing problems with exFAT drives.

Oct 25, 2023 5:23 PM in response to emmyluty22

Thanks for your reply emmyluty22. I need my drive for both Mac and PC so unfortunately I'm stuck with ExFAT.

I've upgraded to the latest Sonoma SW (14.1). According to Apple there is a fix for external drive mounting issues. Not sure if this fixes the corruption issue. I can confirm that reading the files on the external drive is still very sloooowww, compared to Ventura, which was intantaneous.

External SSD corrupting after after upgrading to Sonoma.

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