What image were you attempting to flash @FatDave?
I wonder if adding “clean” and a file system type might be necessary in your case, as shown here: How to use DiskPart to clean and format drive not working on Windows 10 | Windows Central
What image were you attempting to flash @FatDave?
I wonder if adding “clean” and a file system type might be necessary in your case, as shown here: How to use DiskPart to clean and format drive not working on Windows 10 | Windows Central