Apple SSD Data Disc

derekfromcoleraine wrote:

Many thanks for you speedy reply.

I tried your suggestion and get the error message attached below.

All my data was in the iCloud so when I logged into iCloud it was all downloaded without problem. I also had a copy on an external disk, but it wasn't needed.

I downloaded all my apps from the app store and the ones not there form the developers site.

Thanks

Derek

https://discussions.apple.com/content/attachment/2b00f09f-38ea-4996-b8b7-19181282857f

Add, delete, or erase APFS volumes in Disk Utility on Mac ...

You can remove the second one in your Screenshots using the Remove Volume button (–).

The one without the Home badge is the old one you didn't remove prior to installing the OS.

However…

Did you migrate your user data after reinstalling the OS? It appears the orphaned Data volume has a lot more data stored on it.

Did you make a backup prior to reinstalling? If so, you can use that to migrate your data over, or you can manually copy it from the Macintosh HD - Data file you see in the Finder into the appropriate places in your new home folder.

Maybe try restarting in Safe Mode, quit all apps, and try again.

Might just be able to restart and try again.