Secondary Storage Devices can store hundreds of gigabytes on them in a very small place.
Disk Array - A number of disks are packed together to form the disk array. It has a common cylindrical central shaft and one read-write head per surface.
Automated Tape Library - A number of magnetic tapes are kept together in a sequence forming an indexed library of data.
CD-ROm Jukebox - A collection of CDs kept together and can be accessed in continuation to each other.
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