Difference Between C Drive and D Drive of a Computer
The questions may sometimes come across your mind. Why do all the necessary system files and installed apps end up in the C-drive? Why doesn’t the computer use the free space of the D drive to store data when the C drive runs out of space?
This article will answer all these questions and provide an in-depth understanding of a computer’s C and D drive and their differences as well. But before we get into their difference, you should know that both the C drive and D drive are partitions of your PC Hard Disks. Besides, they could also be two different disk drives installed on your PC.
Remember, disk drives are the essential components of building a PC. And for gaming, you’ll require fast HDDs or M.2 SSD drives for faster data transfer speed.

What is C-Drive?
People use hard drives to store data on their computers. While installing an operating system on a computer is generally installed on the hard drive using various bootable external devices.
While browsing across your file explorer, you might have seen one drive named local disk C. The local disk ‘C’ is the C-drive, a partition of your hard disk. If your hard disk is not partitioned, your entire hard drive acts as a C-drive for the computer.
The system recognizes the C drive as the first primary partition of the hard drive. The operating system of a computer is installed in this drive. The C-drive contains the boot sector along with other critical files.
What does C drive do?
Most apps installed on the computer are, by default, installed in the C-drive. However, you can install software on D or E or else drive, but the C-drive makes installing apps more convenient.
The C: drive is the first possible drive letter for hard discs. The computer generally assigns A: drive B: drive to floppy discs. However, A: and B: drives are sometimes assigned to removable media, such as tape drives.
What is D-Drive?
After the C: which is the primary drive, D is usually the first drive. The manufacturer creates the D partition to fix serious problems in the system. Manufacturers typically employ the D drive as a recovery disk.
What does D drive do?
If your computer contains both a hard drive and a disk drive, which might be a DVD drive, CD-ROM drive, or anything else, the disk drive will be labeled D by default. The D-drive partition is generally used to store personal files and data. It is considered that separating the individual files from the computer’s system files improves the performance of the computer.
Hard drives are the essential parts of a PC. If you make another partition on your hard drive or attach an external device to your PC, such as a printer, flash drive, external hard drive, or modem, it recognizes it as a different drive, such as D, E, F, and so on.
FAQ
Manufacturers typically employ the D drive as a recovery disk. Generally, the D drive comes after the primary C drive.
The first possible drive letter for hard drives is C on IBM-compatible computers. C drive is your hard disk’s first active primary partition. The operating system of a computer is installed in this drive.
It is named the System partition because your operating system is put on it, and the system recognizes it. If your hard disk is not partitioned, your entire hard drive acts as a C-drive for the computer.
Yes, it is possible. However, it is advised that the operating system and other applications be installed on the C drive while files and other folders are stored on the other drives.
To solve this problem, you can delete temporary and unimportant files from the C-Drive. You can also try uninstalling unwanted or unused apps.