1: press F11 to enter the system startup item and select the USB disk to start.
2: after rebooting the U disk and entering the main interface of the U disk boot, use the keyboard up and down keys to select  to determine.
5: in the pop-up interface, the number of partitions can be set on the left, and the partition properties can be set on the right. The assigned size can be set according to your own needs, and then you can click OK to start the partition.
6: then wait patiently for the hard disk partition to be completed.