External SSD appears twice in Finder sidebar

I have an external SSD (1TB Samsung APFS single partition) that appears twice in the Finder sidebar. The drive works fine otherwise. I'm running Ventura 13.2.1 on a 24" M1 iMac. This drive on this Mac was working fine and always appeared once in the sidebar. The double entry just started happening recently (last month or two) and I can't figure out what's causing it. All of my other external drives appear once. I looked close at the info for each entry and they are identical. If I right click on one and select "Remove from Sidebar", they both go. If I open Disk Utility and show all of my connected drives, it only appears once in there. I ran First Aid on the drive in Disk Utility, and that didn't show anything wrong and didn't fix the problem either. I went through all of the Finder settings, and unchecked and checked a bunch of different options to see if anything would make a difference, but no go. I was going to try renaming the drive to see if that fixes it, but that's a last resort because of all the other things I would have to change to accommodate the drive name change. Reformat is also a last resort. Although I can do a rename/reformat, I'm hoping for a simpler answer before I have to go through that.


I've been doing a lot of Internet searching (including these forums) and can't find any information for this issue. I'm stuck. Any thoughts?


Ed


iMac 24″, 13.2

Posted on Mar 7, 2023 10:22 AM

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Question marked as Top-ranking reply

Posted on Sep 23, 2023 01:37 PM

Just had this happen with a new Sonnet NVME Dual TB Dock and two Crucial P3 Plus 4TB SSDs.

iMac 2020 i9 Intel, OSX Ventura 13.5.2


What I found which appeared to solve it for me was

1 : In finder I select remove from sidebar for one of each duplicate.

2: Immediately reboot.


As far as I can tell the problem has currently disappeared.

Tried two reboots to test and finder sidebar appears to be behaving at the moment.


Time will tell if problem reoccurs.


Cheers

David


Looks to be a finder bug

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Question marked as Top-ranking reply

Sep 23, 2023 01:37 PM in response to DIT Ed

Just had this happen with a new Sonnet NVME Dual TB Dock and two Crucial P3 Plus 4TB SSDs.

iMac 2020 i9 Intel, OSX Ventura 13.5.2


What I found which appeared to solve it for me was

1 : In finder I select remove from sidebar for one of each duplicate.

2: Immediately reboot.


As far as I can tell the problem has currently disappeared.

Tried two reboots to test and finder sidebar appears to be behaving at the moment.


Time will tell if problem reoccurs.


Cheers

David


Looks to be a finder bug

Jul 17, 2023 05:34 PM in response to DIT Ed

Same issue. Up to date Ventura, MBP M2 16”, OWC Envoy Pro SX 4TB SSD, formatted single partition APFS, expensive ($110) Apple Thunderbolt cable.


System is shut down at night; drives remain physically attached, start up in AM.


(Now, there is a classic older duplicate drive issue when Time Machine drive is plugged in, and under certain unknowable conditions, two separate identical System drive icons will appear on the desktop. You can eject the phantom/time capsule one, but of course not your actual startup drive.)


I am moderately paranoid about Apple’s continued issues with handling external drives … because I had a months-long AppleCare case trying to solve spontaneous ejection of certain HDD drives. Issue was never actually solved, Apple had not a clue - even though a search will reveal dozens of people having issue going back at least five years, several OSX versions and CPU hardware. We finally completely formatted MBP at the store from scratch, then restored data drive from Time Machine, AND abandoned the problem rotational drives altogether. I retell all of this only because, the best theory on the many Apple Discussion threads, maintained that the hardware and OS X versions are increasingly tweaky in the constant data and power communication through UBS bus to external devices, favor SSDs and APFS, and certain HDDs (which should be formatted HFS+ to work correctly) are just not up to the task of understanding the microsecond handshakes, standby and power down vs sleep and other communication. They just eject, then remount a few seconds later, until the OS messes with them again. This happened with separate Glyph and LaCie drives.


So now Ventura is buggy even in communicating with high end SSD drives in APFS, like Samsung T7 or my Envoy Pro.


Not good, especially when fixes are the same ones shoveled on us since 1986: “Did you restart the computer!”

Mar 8, 2023 12:57 PM in response to DIT Ed

Hello DIT Ed,


Thanks for reaching out to Apple Support Communities. We see you have some questions about your external hard drive and that it shows twice in Finder, and we'd like to help. Although this step may seem simple, have you tried restarting your Mac, and then plugging your external drive in to see if the issue remains? This can sometimes help with connection issues: Shut down or restart your Mac


Restart your Mac
* On your Mac, choose Apple menu  > Restart.
* If you don’t want app windows that are open to reopen when your Mac restarts, deselect “Reopen windows when logging back in.”


We'd also like to try and determine if this is happening other places with your Mac, which can help us isolate more of what's going on. By doing this, please boot your Mac up in safe mode, and let us know if this is also happening there: Start up your Mac in safe mode



Let us know, and we'll go from there.


Regards.

Mar 8, 2023 02:27 PM in response to DIT Ed

Thanks for keeping the thread up to speed DIT Ed,


In addition to safe mode, testing whether the behavior occurs in more than one user account was definitely a helpful step in isolating the behavior. Thanks for posting back with your results.


From here, we recommend that you contact Apple Support, and share the results of your isolation steps. What was learned can help Apple Support plan and facilitate the best next steps.


Cheers!

Mar 8, 2023 02:12 PM in response to Jmanna13

Thanks for the reply Jmanna13. Of all the troubleshooting that I did, one thing I never thought to try was unplug the drive, restart,  and plug it back in again. I tried this and it worked, but then when I rebooted with the drive still plugged in I got the double entries again. So if I leave the drive unplugged and then plug it in after boot, all is well. Since it was working before, I’d rather not have to do that every time.


But I noticed something else while investigating in Safe Mode. By accident I happened to notice that I only see one SSD entry when I’m logged into my admin account. Whether Safe Mode or normal boot, I only see the double entries when I’m working in my Standard account, which is the way I normally work. I only use my admin account when I need to do something that requires me to do so, e.g. some software updates/installs.


Thanks again for helping with this, and I hope this new information may provide an important clue as to what may be causing this issue.


Ed

Mar 15, 2024 08:59 PM in response to DIT Ed

External SSD Partition appears twice in Finder sidebar in SONOMA as well on my new mac mini pro: May have to delete all data and reformat drive. Partition 2 is a Time machine back up of intitail install. Partition 1 shows as duplicates in FINDER even after unmonut and remount. Behaves like a ghost or shadow drive but 1.5 GB not possible on 1 GB External drive: changes on one show up on the other.

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External SSD appears twice in Finder sidebar

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