boot device is nothing but the pendrive or any removable device which is in ntfs format,usually
all pendrive / removal disk are in fat32 file format so its need to convert a pendrive / any removal disk to ntfs
format.the main reason for convert the file format of device is because of windows os can only load / boot from the ntfs file system disks.
booting is nothing but the loading of os files from the your hard disk or from any removal disk which is in the ntfs format.
there are two ways to make a bootable device
using sofrware
using command prompt (always preferred)
first step is to open ypur command prompt by pressing win + r button or type cmd in search
type the following commands in your commant prompt.
diskpart
list disk
select disk 1
clean
create partition primary
select partition 1
active
format fs= ntfs quick
diskpart command is used to get in to the disk part console management so we can able to do lot of things
with your hard disk and removable disk.operation such as create a partition,format a disk etc..,
list disk command is used to display all of your disk attached with your pc including removable disk such as pendrive.
once the list disk command was entered it will shows all the disks which was attached in your pc there is need to select the particular disk inorder to make some
operations on that disk. usually pendrive shown from disk 1.
NOTE:to make bootable pendrive you must select disk 1 if you select disk 0 its
your hard disk following operations may delete data in your hard disk.