A MEDICAT USB stick on Windows 10 computer

I have been trying to make a bootable USB drive with a lot of diagnostic tools on it - MEDICAT - and when I try to install the software onto the drive I get a lot of messages ie not enough memory etc etc.

I tried again to make the disk usable with DISKPART and in list disk there is small asterix against the disk number and am not sure of what that means. So can anyone explain just what that small asterix mean? I have already done everything to make this disk usable but with no luck it just doesn't show up in Windows explorer or is listed on the This PC so I am stuck now and don't know of what to do nest.