Microsoft Office Tutorials and References
In Depth Information
Flash Memory Storage
Portable Hard Disks Some hard disks are portable. An external hard disk (Figure 19) is a
separate freestanding hard disk that connects with a cable to a port on the system unit or commu-
nicates wirelessly. A removable hard disk (Figure 20) is a hard disk that you insert and remove
from a drive. Both internal and external hard disks are available in miniature sizes to allow users
to transport their data easily.
one type of
removable hard disk
hard disk drive
external hard disk
Figure 19
Figure 20
An external hard disk.
A removable hard disk.
Flash Memory Storage
Flash memory is a type of memory that can be erased electronically and rewritten. Flash memory
chips are a type of solid state media , which means they consist entirely of electronic components
and contain no moving parts. Types of flash memory storage include solid state drives, memory
cards, USB flash drives, and ExpressCard modules.
A solid state drive ( SSD ) is a storage device that typically uses flash memory to store data,
instructions, and information (Figure 21). With available sizes of 3.5 inches, 2.5 inches, and
1.8 inches, SSDs are used in all types of computers, including desktop computers, mobile
computers, and mobile devices such as portable media players and digital video cameras. Storage
capacities of current SSDs range from 16 GB to 256 GB and more.
Flash Memory
For more information, visit and
then click Flash Memory
Figure 21 As the price of SSDs drops,
experts estimate that increasingly more
users will purchase computers and devices
that use this media.
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