What should I pay attention to when making a U disk boot disk?

It is more and more common to use a USB flash drive to start the maintenance system. But do you know what issues need to be paid attention to when making a USB flash drive boot disk? 1. Please make a backup of the useful data on the U disk before making the boot disk. It is best to completely format the [1] U disk. 2, there are NTFS partition hard disk or multi-hard disk system, the hard disk drive letter arrangement in DOS and the order in Windows may be different, please find and determine by yourself, so as to avoid misuse. If there is a problem when starting the USB flash drive, please try the following methods: 1 Change to other working modes (ZIP, HDD, FDD); 2 Select other options in the DOS boot menu; 3 Replace a different brand of USB flash drive Re-create it once; 4 Take the U disk to another brand of computer and try it out.