Creating a bootable USB drive involves creating a USB drive that is capable of booting up a computer system with a specific operating system.
This can be useful for installing an operating system on a computer without an optical drive, or for running diagnostic and recovery tools.

To create a bootable USB drive, you need to have a USB drive with sufficient capacity, an ISO file of the operating system, and a tool to create the bootable USB drive.
The tool could be an operating system-specific tool or a third-party tool.

The general steps to create a bootable USB drive are as follows:

- Insert the USB drive into a computer and format it.
- Download and install the tool to create a bootable USB drive.
- Locate the ISO file of the operating system you want to use.
- Choose the USB drive as the destination for the bootable drive.
- Follow the tool instructions to create the bootable USB drive.
- Wait for the process to complete.

Once the bootable USB drive is created, you can use it to boot up a computer system and install the operating system or use the diagnostic and recovery tools.
Keep in mind that creating a bootable USB drive will erase all data on the USB drive, so be sure to backup any important data before starting the process.