How to split the hard drive under ASUS UX21E series Win7 is as follows:

1. Right-click Computer==>Manage==>Select Disk Management in Computer Management.

2. Right-click DATA(D:)==>Compress the volume.

3. Enter the amount of space that needs to be divided from the D drive in the input compression space ==> Click Compress.

4. At this time, a new free space appears in the disk, right-click and select New Simple Volume.

5. Click Next according to the New Simple Volume Wizard prompts ==> Enter the capacity of the new disk to be created in the Simple Volume Size. If you need to create multiple disks, please reserve the next disk here. The amount of space. If you only need to create a new disk, please click Next.

6. Assign the drive letter and file system according to the wizard prompts, and click "Finish".