External Hard Drive Missing After Big Sur Download

T1Nvan --

Got it. Looked at locations on my sidebar - Thing is mine has alway been set to display. I still could not see the drive or get it to mount.

What I did: I installed whatever most recent WD packages I found - this gadget when activated shows all my

external drives. My Passport and my other drive are both WD, but the app even shows my other smaller thumb drives when they are mounted.

I did this against the advice of an advanced user on this thread - it was the only thing that worked. He had advised that

this software interfered with certain Apple processes, but I had no choice.

Thanks again- Epiphany-uc

Do you have a question in there? We can't help you based on just a rant. We need details of the equipment, system and software used. A good start is to download and run Etrecheck. Etrecheck is a diagnostic tool that was developed by one of the most respected users here in the ASC and recommended by Apple Support  to provide a snapshot of the system and help identify the more obvious culprits that can adversely affect a Mac's performance.

IMPORTANT:

Before running Etrecheck assign Full Disk Access to Etrecheck in the Etrecheck's Privacy preference pane so that it can get additional information from the Console and log files for the report:

Also click and read the About info to further permit full disk access.

Copy the report

and use the Additional Text button to include the report in your reply.

Then we can examine the report and see if we can determine what might be causing the problem.

So did you try turning the Mac off and unplug it from the power source for ten seconds, then turn it on again and see if your drive shows?

There is a macOS Big Sur 11.2 update that came out on Monday, February 1, 2021 though. Maybe you could try to update your MacBook Pro to macOS 11.2 to see if that fixes your issues.

I purchase an Ankur hub that’s compatible with Apple device and my external G drive is now working fine on my Macbook Pro

2017

just had the same issue, in my case, it's because I didn't realize that "Locations" needs to be expanded. Hover over it and a ">" appears, click it to face down and hard drives and iPhone appears.

Did you install any of the software that usually comes with Seagate drives?

Have you installed or run any "cleaning", "optimizing", "speed-up" or anti-virus apps on your Mac?

cyeoman -- does the name of your Lacie drive (as it appears on the desktop) have a / character in it? If it does, try taking the / out of the name, then rebooting. (The reboot may be overkill, but it certainly won't hurt!)

Bev, If you launch disk utility and plug in the drive. Do you see the drive in the sidebar? if so can you tell us how it is formatted? APFS, Mac OS Extended, ExFAT, NTFS or something else

I hope this helps.

Paul

I encountered the same issue tonight. MacBook Pro 13" M1 Big Sur v11.0.1, 16gb. Running a project on Premiere Pro. 3 external hard drives (1x WD seagate 4tb and 2x seagate 4tb, all formatted to OS extended journaled) plugged into a U-green USB-C hub. Everything fine in Premier side of things but near the end of the project the WD hard drive starts clicking for no apparent reason. I exported the project during which time there was a few clicks from the WD. On playing the exported video back it had a stutter/skipped second of audio track. I exported it a second time, it had a stutter in the footage near the end. Sent the 2 exported files to my Old Mac (13" MacBook Pro 2011, 16gb, High Sierra. The stutter was still there, so it wasn't an issue with the M1's playback.

Ejected 2 of the EHD's but the WD said it had been disconnected (it hadn't) and was still spinning. Then I got a warning sign saying Mac couldn't repair the disk and to back it up. Finder was showing no EHD's. Disk utility was showing the 2 Seagate. All 3 EHD's were still spinning. I logged out of the M1 and logged back in, it made no difference. I shut down the M1 and all 3 disks stopped spinning eventually. The WD was making click noises like it was breathing it's last.

Started up my old 2011 MacBook Pro, plugged in the WD and it was instantly recognised, no click noises. I'm currently backing up the WD onto another EHD.

It's definately something with Big Sur. I hope there is a fix for this as I'm being forced to complete that project in my 'Old MacBook' which doesn't even have GPU acceleration.

Very interested in the solution to this.

Thanks in advance.

I can't mount my Seagate external drive right after I upgrade to OS Big Sur, I was try to install the Paragon NTFS for Mac both free version from Seagate site and full version from Paragon are all not working, Other third party NTFS app are even can't install to my any of Mac Pro 2014 and MacBoot Pro 2018 or iMac Pro.

The WD external drives are formatted by ExFat so it's all working very well, Only NTFS drive can't work. Wish Apple or any can find the solutions to solve this problem!

I appreciateI have checked everything as I think everyone else here has. This is not us. Everyone tells the same story. I have been able to get it to mount by using disk utility to see it and them it seems time machine can see it as being available.

There is no doubt this is a problem arising out of Big Sur upgrade.

We all have different disks and all are properly formatted. Erasing/reformatting the disk will not help and will only result in hours of work and losing your entire library of backups or whatever other data you store there.

It's a Big Sur-Apple problem. It is not a user generated issue. It is now February 2021 and nothing has been done to fix it.There are several threads going here and even more outside of Apple forums.

Quite surprised this is still going on. Very disappointed having to wait so long for this to be addressed and that Apple has said nothing.

I had the same problem, once I opened finder I was able to use the "Go" drop down at the top off the screen and select "computer" to find the SD card that I had plugged into my laptop. Hope this helps!

You will then need to contact Apple Support about the installation of macOS Big Sur 11.2.1 failing along with your external drives failing on your MacBook Pro and everything you have tried to get macOS Big Sur 11.2.1 and your external drives to work on your MacBook Pro up to now to see if they can help you out or not. If they can't help you out, they may either send you to an opened nearby Apple Store or to a nearby Apple Authorized Retailer if there aren't any Apple Stores opened near where you live.

What brand of harddrive is not showing up? Also how is the drive formatted? NTFS, ext3, APFS or something else?