Some of these devices may be purchased as either external or internal models. The choice is yours. Internal Components - comprise the majority of components that you never see but which are the heart of your system. File storage Media - all data must be named and saved as files. Where you put these files involves a variety of choices.
Hard disks come in varying storage capacity and speeds.
Hard disks can be added to your computer as needed, if you have enough room inside your computer case to add another disk drive. Hard drives store more data, are more expensive, and are much faster than floppy drives . This is accomplished by designating drives with letters followed by a colon . Remember, drives must have the colon after their letter designation or they will not be recognized as drives in a command line . Seen from above a hard disk has a read-write head which travels across barely above the surface of each disk platter.