Download the Rufus if you haven’t download it yet. Rufus also comes in a compact version along with a standard installer. If you're not going to install Rufus on your machine, download the portable edition. Set up and open Rufus after downloading.
Plug into the USB drive, and in the top-down menu, you can see this immediately. Click on the button "Select" when you see the drive.
Go to the browse window, select it, and press the 'Open' button, to which your ISO file has been saved.
Click the 'Tick' icon next to the 'Boot Selection' menu to measure if you like, and see ISO file controls for MD5, SHA1, and SHA256. This is useful for checking if the ISO file has been manipulated.
From the Target Device down menu, select "MBR" from the Drop-Down Partition Scheme and "BIOS or UEFI." Pick the 'Attach fixes for old BIOSes' checkbox in the 'Advanced Drive Assets' section, if you're trying to use this bootable USB drive on the old device.
You can use the "Volume label" field to modify the name of the USB drive. Also, ensure that the "Quick Format" checkbox is selected under Advanced Format Options.
Tap on the ‘Start’ option.
Rufus can request that you download more files, depending on the ISO file. Rufus prompts you, for example, to download the newer version of Syslinux to build a bootable Ubuntu disk. Only press the "Yes" button and Rufus will do it all.
Select "Write in ISO image mode" option and click on the "Ok" button in the next prompt. An alert format can also be found and Click "OK".
Rufus begins making the bootable USB drive when you click on the button. It can take a few minutes to complete the development process depending on your USB drive.
After the progress bar is finished, the message is not finished, but a completion sound is heard and the progress bar turns entirely green.