1. Storage Devices
By:
Tolga, Keeshan, Adam

2. Read Only Memory (ROM)
It’s a class of storage media used in computers and other electronic devices.
It’s a special kind of memory that gives instructions which the computer uses when it ‘boots up’.
The ROM is attached to the Motherboard.
The data is not erased when the computer is turned off.

3. Random Access Memory (RAM)
RAM memory is known as ‘volatile memory’
Is a form of computer data storage.
RAM, usually in the computer main memory or primary storage
Working memory

4. Hard Disk
A hard disk drive is the physical medium that is used to store any and all information.
Advantage: Stores data on a long term basis.
Large storage capacity
Disadvantage: eventually fail which stops the computer working
Big and bulky

5. Floppy Disk
Floppy disks are one of the oldest types of portable storage devices still in use, having been around since the 1980s.
Advantage: small and compact for its time
Disadvantage: old and out of date.
No built in floppy disk drives in new computers

6. Zip Disk
Zip disks are pretty much obselete now. However, they were very popular as a back before CD-RW’s were cheap enough to be bought by everyone.
Advantage: a lot of storage back in it’s time.
Disadvantage: NOBODY uses it

7. Magnetic Tape
Large organizations who need to back up their systems daily tend to use magnetic tapes to store their data.
Advantage: cheap
Disadvantage: serial access so can be quite slow to access data.
Need a special piece of equipment to record and read the data on the tape.

8. Compact Disks (CD)
CD-ROM - CD Read Only Memory. This means that when you buy the disk, it already has the data or program stored on it. You can read it, but can't save to it. An example would be a music CD that you buy from a shop.
CD-WORM - CD Write Once Read Many. This means that you are able to save to this disk one time, so you can store your data or an application on it of your choice. However, once you have saved onto the disk once, you can access the data many times but can't save onto it again.
CD-RW - CD Read Write. This means that you can save data to your disk over and over again, just like you can with a floppy disk.
Advantage: Small and portable.
Cheap
Disadvantage: Fairly fragile easy to scratch and snap.
Slower access than hard disk.

9. DVDs
DVDs are amongst the most common methods of copying and backing up data at home.
A DVD is similar to a CD in that it is an optical device and that a laser is used to store the data and read the data.
Advantage: large storage capacity
Disadvantage: DVDs don’t work in CD drives.
                         

10. Flash Memory
Flash memory storage devices are typically small, lightweight, removable and rewritable.
They consist of a small printed circuit board which is encased in plastic or metal casing.
Advantage: They are more compact and portable than floppy disks or CDs/DVDs.
Disadvantage: At the moment, the cost per megabyte of storage is more expensive than floppy disks, CDs or DVDs.

11. QUIZ
Which of the following is the smallest unit of data which can be stored?
Megabyte
Bit
Kilobyte
Big byte

12. Wawawiwa
You got it wrong HIGH FIVE!

13. Bit
CORRECT! I like !
Next Question

14. Kilobyte
Wrong again…

15. Megabyte
Try again faillllureeee

16. The word Bit is made from Binary Digit?
True
False

17. True
Correct
Next Question

18. False
wrong

19. Correct size of a kilobyte?
1024 bytes
1024 megabytes
1000 bytes
1000 megabytes

20. 1024 bytes is correct …
Next question

21. Wrong..
wrong

22. Wrong again

23. Wrong again

24. ROM is volatile memory?
False
True

25. CORRRRRRRRRRRREEECT
Next question

26. My suit is black not
this answer is right pause not.

27. The hard disk stores the application that you regularly use on your computer
True
False

28. Correct

29. Wrong…