Sorgelig wrote:tell me more about built-in Win10 tool.
It's under Control Panel/Administrative tools/Computer Management then Disk management under Storage. I believe older versions of windows also have this tool but I'm not sure when it started supporting VHD files.
Under the "Action" Menu pick "Create VHD"
Enter name ie "E:\boot.vhd"
Select size 108MB or whatever. Default options "VHD" and "Fixed Size" should already be selected. Press [OK]
A new disk "unknown/unallocated" will be created down below. Right-click on the left where is says "unknown" and select "Initialize Disk" - choose MBR (Master Boot Record) partition. Press [OK]
Right-click on the right "Unallocated" part of the disk and select "New Simple Volume" then press [Next]
"Specify Volume Size" - size should be max by default. just press [Next]
"Assign Drive letter and Path" - change drive letter if desired and press [Next]
"Format Partition" - Select FAT32 as the File system and press [Next] (FAT16 did not work for me)
"Completing the new simple volume wizard" - press [Finish]
Copy BEEB.MMB to the new drive letter.
Right-click on the disk again (in the management tool) and select "Detach VHD". Press [OK]