No, it is a mass storage device.
No a disk drive is neither input or output device, it is an optical disk drive (for CD/DVD's) and a disk drive (for hard drives) would be a storage device.
A output device is what you plug into a computer, such as mouse, keyboard, external hard drive, USB etc.
it should be some kind of portable storage device such as USB stick or hard drive.
Computer
A hard disk drive (HDD) is neither an input nor an output device. It is a Storage Device. It helps to store the data in a Non-Volatile form (i.e Data stored in Hard Drive is not lost even after it's power source removed) and data can be retrieved at any time by enabling power for the Hard Drive.
It is. However, it is also an output drive. Since you can store information on a hard drive, as well as reading information from it, it is both.
Neither. Is Your hard drive input or output? Neither. It is simply a storage device as a flash drive or internal optical drive would be.
A portable hard drive is both of the following:a hard disk drive that is small enough to carry (portable)a hard disk drive that is external to a computer
It's an input and an output device. Programs and data are input from the hard-drive to the computer's memory for processing. The results are written back onto the drive when you save your work.
storage devices like the hard drive
A portable hard drive is both of the following:a hard disk drive that is small enough to carry (portable)a hard disk drive that is external to a computer