Hi on its a long term storage of information like personal profiles like desktop etc the Ram would be a temporary storage of data
hard disk drives
hard disk drives
Hard disk drive inside the PC, CD or DVD drives/disks, USB (thumb drive, jump drive), and floppy disk drive/disk storage. Other storage can be external Hard disk drives, tape drives, RAID drives and the newer Blu-Ray.
Disk storage devices are most commonly used in personal computers as a means to enhance memory. The most common are hard disk drives, optical disk drives, and even zip drives.
I believe that you mean to ask if hard disk drives are considered volatile storage media or not. Volatile memory is memory that is lost when the storage medium is not being supplied with electricity. Hard drives do not need power for storage, only for reading and writing data from and to the platters; this means that hard drives are not volatile storage media.
HDD is an abbreviation for "Hard Disk Drive." Hard disk drives are the primary form of file storage found in a computer.
Solid State Disks Hard Disk Drives are also secondary storage devices.
Magnetic storage is used on hard drives and floppy disks. Sectors of the disk are charged magnetically and are easily changed later. Optical storage uses a laser to read data. On a cd/dvd, the laser picks up tiny marks made starting in the center and rotating outward.
Hard disk drives
to connect storage devices such as hard disk drives to a PC
Now a days every storage disk drive is portable.. You can have portable hard disk, cd/dvd drives and floppy drives.. All are having a USB interface..
DVD-ROMCD-ROMExternal hard diskfloppy diskpen drive