It is just a tradition. In some case it safer to install your system on drive D. It provides additional security due to the face that many viruses are hardcoded for disk C.
A: is the first floppy drive and is seldom in use today. C: is most often the first master hard drive partition. D: is most commonly the CD Rom in a system with a single hard drive partition.
C: drive is the main hard drive on your computer. Hard drives are identified by letter, with C: being reserved for the first bootable drive in a computer.
The first hard drive in the computer is usually designated is Drive C:.
In Windows, Drive C: is the first hard drive.On the PC compatibles (DOS then Windows, which was a program running under DOS), drive A: was reserved for the first floppy disk drive and B: for the second floppy disk drive. Drive C: was reserved for the first hard drive.Many computers don't even have floppy drives anymore, but the first hard drive is still labeled C:
To switch from drive A to drive C in a command prompt, you simply type C: and press Enter. This command changes the current working drive to drive C. If you need to switch back to drive A, you would type A: and press Enter.
The first hard drive or partition.
On C drive is where your Windows and program sis installed. So proably it won't do without reinstalling them.
C: Drive is the main drive within your PC and the most important. It holds all of your PC's folders and information, it is set as the C: drive automatically when you first install windows. Some of the folders it contains are, Documents and Settings Program files WINDOWS
The A and B drives had special designations. Even though modern PCs don't have them any more, the letters are still not used. You can do things like insert a Zip drive into your machine and use that as a B drive. It may be possible to reassign the C drive in a similar way, but there is no reason why you would do that. The C drive should be left as your C drive.
C drive
First Of all chose file path.Then take to the Mac address and to find it for extend the C DRIVE
Use any disk partitioning program to resize the drive.