If you have required to make bootable Pendrive then you can create bootable Pendrive using software or command line. Command-line is the best way to make bootable installer windows 7, 8.1 and 10 also those tools support bootable windows server.
diskpart List Disk Select Disk 1 Clean Create Partition Primary Select partition 1 Active format fs=ntfs quick exit xcopy *.* /s/e/f x:\
You can also create a bootable Pendrive via Rufus software.