For your target you’ll need a bootable NTFS file system. You reach this requirement with the following commands:

diskpart
select disk "disknumber"
clean
create partition primary
select partition 1
active
format fs=ntfs quick
assign
exit

After this preparation you can copy the files onto the disk.

Remarks: If you have the problem with Windows Server that the “disk is offline because of policy set by an administrator” then you have to proceed the following steps before:

diskpart
san policy=OnlineAll
select disk "disknumber"
attributes disk clear readonly
online disk