In case of UEFI Computer even if Rufus selects NTFS format and you wish to leave it as it is, there's nothing to worry. Then it will start creating the required bootable pen drive using the supplied bootable ISO file.Īdditional information, though not much related. Next based on the partition scheme selected in input it will first clear previous structure and re-create desired MBR or GPT structure. So ensure that if you have any critical data on the pen drive, back it up elsewhere.

See the screenshots below giving you the perspective how Rufus creates the bootable pen drive.įirst it warns you that all contents of the pen drive shall be erased. So when you select Windows 10 32 bit ISO, you can specify MBR Partition Scheme for BIOS Computer with FAT32 formatting, all previous contents of the USB Pen drive will be erased and a specified scheme shall be created on it with bootable ISO file. Every time you use Rufus, it formats the USB pen drive in question based on the selected input like the ISO File, Partitioning Scheme and boot type (BIOS/UEFI).

Win 10 boot usb