Lets learn something about SECONDRY MEMORY. You will learn About CDs , Pendrives.

1. SECONDARY
MEMORY
A PRESENTATION BY ASHWIN

2. SOME EXAMPLES OF
SECONDARY
MEMORY ARE
1) EXTERNAL HARDISKS
2) PENDRIVES (USB)
3) CD (COMPACT DISK)
4) DVD ( DIGITAL VERSATILE DISK ) , ( DIGITAL VIDEO
DISK)
5) DATACARD
6) BLUE RAY DISK (BD)
7) CLOUD STORAGE

3. MORE ON EXTERNAL HARDISK :-
AN EXTERNAL HARD DRIVE IS A
PORTABLE STORAGE DEVICE THAT
CAN BE ATTACHED TO A COMPUTER OR
LAPTOP THROUGH A USB OR FIREWIRE
CONNECTION OR WIRELESSLY.
EXTERNAL HARD DRIVES TYPICALLY
HAVE HIGH STORAGE CAPACITIES AND
ARE OFTEN USED TO BACK UP
COMPUTERS OR SERVE AS A
NETWORK DRIVE
EXTERNAL HARDISKS CAN STORE
UPTO 1 TB TO 16 TB

4. A USB FLASH DRIVE IS A DATA
STORAGE DEVICE THAT INCLUDES
FLASH MEMORY WITH AN
INTEGRATED USB INTERFACE. IT IS
TYPICALLY REMOVABLE,
REWRITABLE AND MUCH SMALLER
THAN AN OPTICAL DISC. MOST
WEIGH LESS THAN 30 G.
IT CAN STORE DATA UP TO DATA 1
TB
MORE ABOUT PENDRIVES :-

5. MORE ABOUT CD ( COMPACT DISK ) :-
COMPACT DISC (CD) IS A DIGITAL
OPTICAL DISC DATA STORAGE
FORMAT THAT WAS CO-
DEVELOPED BY PHILIPS AND SONY
AND RELEASED IN 1982. THE
FORMAT WAS ORIGINALLY
DEVELOPED TO STORE AND PLAY
ONLY SOUND RECORDINGS (CD-
DA) BUT WAS LATER ADAPTED FOR
STORAGE OF DATA (CD-ROM).
IT CAN HAVE UPTO SAPE 600 TO
700 MB

6. MORE ABOUT DVD ( DIGITAL VERSATILE DISK )
DVD IS A DIGITAL OPTICAL DISC
STORAGE FORMAT INVENTED AND
DEVELOPED IN 1995 AND RELEASED
IN LATE 1996. THE MEDIUM CAN
STORE ANY KIND OF DIGITAL DATA
AND IS WIDELY USED FOR SOFTWARE
AND OTHER COMPUTER FILES AS
WELL AS VIDEO PROGRAMS WATCHED
USING DVD PLAYERS.
IT CAN STORE UPTO 4.7 GB TO 17 GB

7. MORE ABOUT DATA CARD
A DATA CARD IS ANY REMOVABLE
COMPUTER COMPONENT,
APPROXIMATELY THE SIZE OF A
CREDIT CARD, THAT
CONTAINS DATA, OR THAT
CONTAINS NONVOLATILE MEMORY
TO WHICH DATA CAN BE WRITTEN
AND FROM WHICH DATA CAN BE
RECOVERED. THE TERM IS A
SYNONYM FOR SMART CARD.
IT CAN STORE UPTO 256 GB.

8. MORE ABOUT BLUE RAY DISK
BLU-RAY DISC (BD), OFTEN KNOWN
SIMPLY AS BLU-RAY, IS A DIGITAL
OPTICAL DISC DATA STORAGE
FORMAT DESIGNED TO
SUPERSEDE THE DVD FORMAT,
CAPABLE OF STORING SEVERAL
HOURS OF VIDEO IN HIGH-
DEFINITION (HDTV 720P AND
1080P).
IT CAN STORE UPTO 50 GB

9. MORE ABOUT CLOUD STORAGE
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.
IT CAN STORE PHOTOS , VIDEOS
AND ETC