PeToUSB is a small, not resource-intensive, quite easy to use and, at the same time, solid in terms of functionality technical application designed to format usb-drives (flash drives and removable/external hard drives) and then create on them "boot" distributions of the old, but still in demand Windows XP operating system. It's also worth noting that this special program is also perfect for backing up the OS and successfully transferring them to usb-drives via Master Boot Record, which previously could only be written to CDs or kept on a special hdd partition on the computer.
One of the real advantages and undeniable advantages of PeToUSB over other similar software is that it can work with "pre-installation" versions of operations - Microsoft WinPE and author's BartPE, which are very popular with computer users, because they allow to carry out a full pre-installation work (format disks and create partitions on them, delete and transfer information to the hdd t.e.), as well as due to integrated software (antivirus, disk managers, system utilities), and reanimate damaged operating systems.
In addition to all the above, PeToUSB can also provide detailed information about any usb-drive and give an opportunity to reassign a letter to the device.