CompTIA A+ 220-701 - Storage Devices - Part 3 of 3

This video explain some kind of renovable storage and the uses.

MEMORY CARD


An electronic flash memory storage disk commonly uses in electronic devices such as digital camera, mp3 players, mobile phones and  others. Memory cards are usually read by connecting the device with the card to the computer or by using a USB cable.

FLASH DRIVE


Is a small, portable flash memory card that plugs into a computer USB. USB flash drives have less storage capacity than a external hard drive, but they are small and more durable because they do not contain any internal moving parts.

Some examples of storage device

HARD DISK  


A magnetic disk on which you can store data. The term hard disk is used to distinguish it from a soft, or floppy disk.There are two types of hard disk:


1.Hard disks fixed internally 
2. External hard disks fixed to USB

 


FLOPPY DISK 


A soft magnetic disk. In contrast to hard disk, floppy disk are portable, because you can remove them from a disk drive. Floppy disk are slower to acess than hard disk and have less storage capacity than hard disk.

CD's 

Is a compact disk with oe or more metal layers capable ofstoring digital information. Is used for music industry to store digital recordings.  And CD roms are used to store computer data.

DVDs

Is a type of optical disk technology smilar to the CD rom. DVDs are commonly used as a medium for digital representation of movies and other multimedia presentations that combine soond with graphics.

Portable storage devices are more common every day, every time the manufactured with greater capacity and more manageable in size. I can mention: CDs, DVDs, audio cassettes, discs 3, 5, memory cards, photographic reels, USB, flash memory.

Data Storage Equipment

Any input/output equipment may be considered data storage equipment if it writes to and reads from a data storage medium. Data storage equipment uses either:

• portable methods (easily replaced),
• semi-portable methods requiring mechanical disassembly tools and/or opening a chassis
• inseparable methods meaning loss of memory if disconnected from the unit.

Primary storage

Direct links to this section: Primary storage, Main memory, Internal Memory.

Primary storage (or main memory or internal memory), often referred to simply as memory, is the only one directly accessible to the CPU. The CPU continuously reads instructions stored there and executes them as required. Any data actively operated on is also stored there in uniform manner.