The Startup Disk Creator suffers from several bugs. You have found (maybe) two of them.
dd has been mentioned in this bug report. It is cloning - a very straight-forward process, but dd does what you tell it to do without questions - even if you tell it to wipe the family pictures. I made a tool to wrap a safety belt around dd, mkusb.
There is a project, where the Startup Disk Creator will be radically changed - the intention is that it will also use dd under the hood.
The Startup Disk Creator suffers from several bugs. You have found (maybe) two of them.
dd has been mentioned in this bug report. It is cloning - a very straight-forward process, but dd does what you tell it to do without questions - even if you tell it to wipe the family pictures. I made a tool to wrap a safety belt around dd, mkusb.
There is a project, where the Startup Disk Creator will be radically changed - the intention is that it will also use dd under the hood.