How to partition the hard disk when installing Windows 10

. After starting the win10 installation program, until the hard disk partition is selected to install the system, if it is a new hard disk, the system can be installed in the score area.
2, select "unallocated space", click "New".
3, C drive to a 30G or so, probably fill a 30,000MB, click "Application".
4, this so-called extra partition, give it, not giving is very troublesome, decisive point " OK ".
5, then click "Unallocated space", D drive also gives 30G, about 30,000MB. Then click "Application".
6, the installation program has a hard injury, even the extra partition, only four partitions. So, so, leave the rest to the E drive and click "Apply".
7, after the partition is completed, to be used normally, you have to format each partition.