Hi Clunky
I am an Independent Advisor here to help
I would recommend that you proceed as follows
Search for the command prompt on the Start Menu by typing cmd. Right-click the command prompt icon and select “Run as Administrator.”
type the following command into command prompt
diskpart
press Enter
Type the following command and press Enter
list disk
you will see connected disks have numbers
Type
select disk # (replace the # with the number of the disk that you wish to format)
Press Enter
Type
clean
Press Enter
Type
create partition primary
active
Press Enter
Type
format fs=ntfs label="insert your choice of name of drive here" quick
Press Enter
Type
assign
Press Enter
Now you are done and the disk is formatted to NTFS