By AOMEI / Last Updated July 22, 2019

With the development of computers came exploitation by malicious hackers, malware, viruses and so on. The C drive is the common target because it is the default drive for installation of the operating system. For this reason, some people pay attention to security choose to create a small C drive to hold a few DOS utilities and other files, but install the main operating system on the D drive.

Actually, if the C drive is too small, it could not satisfied with the needs. Say, if you download games which are made for DOS will require installation on the C drive, so if there is not enough unallocated space you cannot install them successfully. Also, some older software packages install automatically to the C drive regardless of where the operating system is located.

We all know that you can only allocate free space from one partition to another in the same disk, but if the C drive is running out of space or you need to put a big installation file in the C drive, the only solution is to replace the small C drive with a larger one. If it is the case, you may refer to the two ways as below to realize the goal.

AOMEI Partition Assistant is special designed for Windows platforms, and it has different types of editions for different users. To replace small C drive, you may migrate the drive to a new SSD or clone hard drive. In the process, third-party software is a wise option. AOMEI Partition Assistant is a perfect one which can help you do that just with a few clicks of your mouse and without reinstallation and spending a penny.

  • Way 1: Replace small C drive by Migrating to a new SSD

  • If you got a new SSD, install it to your computer first, and then migrate the C drive to it with AOMEI Partition Assistant’s built-in “Migrate OS to SSD/HDD” function. You may learn more about how to migrate OS to SSD with Partition Assistant.

    Migrate OS to SSD
  • Way 2: Replace small C drive by cloning hard drive

  • The second way is to clone hard drive and then extend the C drive. Its “Copy Partition” feature allows you to clone C drive to a new hard drive. For more info about clone hard drive, please refer to disk copy wizard.

    Copy Partition

    Just by doing that, the problem can be solved with ease and you may download this freeware to have a try.