1: Open the Explorer to see if there is not much space on drive C. If there is not much space, it will be displayed in red. If red is displayed, you need to clean the disk. 2. Right-click drive C, and then select the bottom property in the pop-up menu to enter the properties of drive C. 3. There is a button on the property page to clean up the junk files on this disk, and click this button with the mouse. 4: The program will start searching for junk files and calculate how much hard disk space can be released. If you have too many junk files, it will take a long time. 5. After the search is completed, a list will appear, which contains some useless files. There will be an option in front of you to delete some files according to your choice, and then click OK. 6: You will be prompted to confirm whether to delete these files. If you are sure, click Delete File. 7: As shown in the figure, the program is cleaning up the files you selected. After cleaning up, your C drive will have a lot more space. 8. If your disk space is too small, you can choose a compressed drive in the property page to save disk space, which can save space to some extent.