Windows.md

Windows

Offline hard disk

run diskpart

#list all mounted disks
list disk

#select target disk
select disk [number]
offline disk
online disk 
#if not online again, the hard disk will not auto mounted next time

Reformat bootable USB to normal USB

Refer to this

run diskpart as admin

#list all mounted disks
list disk

#select target USB
select disk [number]

#reformat
clean
create partition primary
select partition 1
format fs=fat32 quick