(When you are making a bootable USB disk, suggest you choose the FAT32 file system.)
This software currently only support Windows bootable disk, can work with both BOOTMGR and NTLDR boot mode, can create USB disk with FAT, FAT32, exFAT or NTFS file system.
There do not have any complicated settings, it is easy to use very much. The program's interface is very simple, you only need select the ISO file you want to burn and the target USB drive, then click "Burn" button, an USB disk that includes all ISO image data will be created. The ISO image file is a popular image of the CD/DVD discs, an ISO file can include all the content on the disc, this software can easily burn these ISO files to a USB flash disk, makes it easy to carry and use.
Connect the USB drive to the computer you want to install Ubuntu on and then power the computer on.Click "Close" when Rufus is completed creating the bootable USB Ubuntu installer, and then remove the thumb drive from that computer.The creation of the bootable USB Ubuntu installer will be complete when the green progress bar at the bottom of the Rufus application is entirely green, and when the message below the progress bar says Ready.