Hard
disk is the secondary storage device, which holds the data in bulk,
and it holds the data on the magnetic medium of the disk.
Hard disks have a hard platter that holds the magnetic medium, the
magnetic medium can be easily erased and rewritten, and a typical desktop
machine will have a hard disk with a capacity of between 10 and 40 gigabytes.
Data is stored onto the disk in the form of files. 
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Java - Operations
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