Cannot partition external SSD

Since Catalina, I have been unable to run Carbon Copy Cloner. I finally read the error messages and tried to partition my external SSD (target disk) and I am unable to–tried an iMac, MacBookAir and MBP.


I know the CCC developer discussed this (amongst other things)

He specifically mentions clone issues (but can’t remember exactly where in the episode)

Yes I also vaguely remember him discussing this in that recent episode.

an article from Bombich about this

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If you’re looking to repartition a drive, I find it’s helpful to go under View and make sure Show All Devices is checked.

Very helpful, thanks.

Stumbled on the GUID partition option at some point in the process. All is well. Thanks for your help.