An external disk refuses to mount, com.apple.DiskManagement.disenter error -119930868.

I have had the same problem, I've tried all the suggested methods, NOTHING WORKED! It finally worked by doing the followings:

• Finder, Applications, Disk Utility, Highlight the External Disk even if it's color-faded, click on First Aid, wait to finish, click on mount. AND VOILÁ

If it worked for me it must work for everyone else!

I first tried to repair the drive (go to Utility > Disk Utility) then finding and selecting my external drive (which was displayed but greyed out) then hit the first aid button and then wait for the first aid repair to fail. This would fail on the fsck.hsl. Find the fsck.hsl file in your activity monitor (open this app) then under the 'disk' tab force quit this file name (search for it) and the drive should mount immediately. You can now copy your files to another external drive. Good luck

I dont want to pay another app. Thanks!

My drive is also Seagate! Probably it's a Seagate thing? I tried to leave it over night- it didn't mount ( other drives I have are WDs and they mount ok.

The only solution I could find after much research was to download Tuxera. Now I can access my external drive quickly like before.

As unsettling as this is, it's good to know it's not just me having this issue.. hopefully at some point a fix can be found!

-Cleo

Apple must fix this and soon or the future of OSX will be compromised.

That saved my bacon!! Thanks very much, worked like a charm

Thank you !

No way. My 1TB and 2TB WD USB drives with exFAT mount flawlessly in Catalina unless I forget to safely eject them, that’s always the case.

doesnt work.

has anyone found solution yet? im having the same problem since updating

A mi me esta pasando lo mismo, mi unidad de disco no se monta desde que instalé Catalina. Yo tengo WD passport

¿ A alguien le ha funcionado volver a mojave para al menos hacer una copia de seguridad?

My WD drives are effected by this issue. I can run first aid on them, but i'm not able to mount them.

I will try being more patient here - we'll see