DrivesA drive or disk drive is a hardware device in which you can store files and folders. Disk drives are assigned by a letter (e.g. C, D, E etc.)Your hard drive (the drive inside your Computer icon) is known as the (C:, D:, E: ) drive. Hard disk drive is the location where all files are stored in any computer. In Windows, the name of hard drive start from C: drive because it is the first available drive letter. The computer assigns A: and B: drives to floppy disks and sometimes other removable media such as tape drives.