Disk is not convertible to APFS
I cannot reinstall MacOS on Mac mini, when 2 minutes are left before the installation is completed, the system gives an error: Disk is not convertible to APFS
The same error occurs with external hard disk drives
How can I solve this problem? Thanks!
PS: I don't have a backup due to the fact that I want a clean OS
Mac mini, macOS 11.0