When there is unallocated space on your system disk, you can simply resize C drive to get more space. With this program, you can extend C drive effortlessly with or without unallocated space. How to Extend C Drive with EaseUS Partition MasterĮaseUS Partition Master is an all-in-one partitioning tool that is fully compatible with Windows 10/8.1/8/7/Vista/XP. How to extend C drive in Windows 10/8/7? EaseUS partition manager offers you the simplest way to increase C drive. One way to solve this problem is to extend system partition to improve computer performance. If you are in this situation, don't worry. When your C drive is full and out of space, you will suffer low work efficiency, the system will run unstable, and you may not be able to download and install new software or use the installed programs. Insufficient disk space will affect the normal use of a computer, the system disk space shortage is particularly serious. Have you ever receive the low disk space warning when you boot your computer or use a hard drive? When this error message pops out, it means that your hard drive is running out of space. PAGE CONTENT: How to Extend C Drive with EaseUS Partition Master with or Without Unallocated Space How to Extend C Drive When There Is Adjacent Unallocated Space