hard disk
An input device. In fact it is the ONLY way to input data into a computer. However, the most common input device is the computer's hard-drives or mass-storage devices (which are also output devices), followed by the mouse and keyboard.
There are many storage devices that are used in everyday computing. If you mean storage devices as for what you can use to store data and save then I believe the following are very common: * Hard drive * DVD * CD * USB Thumb Drive * Compact Flash Drive (the small flash drives you put in camera's) * Network Storage Server (If you save files online this is what is used) RAM is another storage device but it is only used by the operating system on your computer. So you really have no ability to save information on them.
they are types of hardware
both are the storage devices both store the data in binary form both are the costlier
The most common type of computer file storage is Hard Disk , it is in built with computer . External Storage is Like CD , DVD , Pen Drive , Floppy Drive .
cd rom
It is when a storage device is removed from a computer. Examples of common storage devices that are often removed from computers today are... - solid state USB devices (aka jump drives or thumb drives) - solid state storage cards (aka SD cards) - CD/DVD recordable or rewritable media (aka CD-R, CD-RW, DVD-R, DVD+R, DVD+-R, etc.) - hard disk drives (aka hard drives, HDDs, disk drives)
nothing
It's a hard disc drive.
Computer Peripherals.
Some of the best direct access storage devices in the market now are external hard drives and flash cards. Flash cards are common in phones and tablets.
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.