Due to a problem, I want to copy the contents of an external disk with a corruption in one partition. The corrupted partition is HFS+ and the other is APFS. The APFS partition is a Time Machine backup, and thus many operations on it are disabled by SIP or ACLs or xattr.
Most of the files on the problem partition are still accessible.
What is the best way to partition a new drive into two APFS volumes of approximately the same size and usage (one for Time Machine and one for interactive archiving)?