Cloud storage is a model of computer data storage
in which the digital data is stored in logical pools.
The physical storage spans multiple servers, and
the physical environment is typically owned and
managed by a hosting company.
Magnetic Storage
Fixed/Internal hard disk drive
Portable hard disk drives
Magnetic tapes
Magnetic storage media depend on the magnetic properties of
certain materials. It is coated on the surface of a disk or tape
that can be magnetised in such a way as to represent a 1 or a 0
Optical storage media
CD-R and DVD-RW
CD/DVD
CD-ROM and DVD-ROM
CD-RW and DVD-RW
DVD-RAM
Blu-ray
discs
In computing and optical disc recording
technologies, an optical disc is a flat, usually
circular disc which encodes binary data in
the form of pits and lands on a special
material on one of its flat surfaces.
Solid state drives
Memory sticks/pen drives
Flash memory cards
A solid-state drive is a solid-state storage
device that uses integrated circuit assemblies
as memory to store data persistently. It is also
sometimes called solid-state disk, although
SSDs do not have physical disks.
Serial Access
CD-ROM
Diskettes
WORM
DVD-ROM
Serial access is where data records are
stored one after the other with no regard
to the order. This is usually an
unprocessed file. Serial files are read by
starting at the beginning and reading
through every record until you find the
one that you want.