![Optical backing storage media suchas CDs and DVDs CDs tend to be used for large files (but smaller than 1Gb)which are too big for a floppy disc to hold such as music and general animation. DVDs are used to hold very large files(several Gb) such as movie films. Both CDs and DVDs are portable i.e. they can be transported from one computer to another. Both can be used to store computer data. Advantages ,[object Object]](https://image.slidesharecdn.com/igcseictpresentation-masterslided-091209213012-phpapp01/85/Igcse-Ict-Presentation-Master-Slided-1-320.jpg)
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- 2. Portable.
- 4. Most DVD players and drives can't read DVD-RAM discs.
- 5. Very few players can play in reverse at normal speed. Maprang 10GM
- 7. They are not expensive.
- 10. Not expensive
- 15. Less problem about formatting and finalising.
- 17. 12x media is not reportedly available in Europe
- 18. DVD-RAM media have always been more expensive than other types of DVD. DVD RAM Maprang 10GM
- 20. Fully compatible with all features
- 22. Expensive than a normal CD.HD DVD Maprang 10GM
- 24. Easy to carry.
- 25. Huge storage capacity.Disadvantages - More expensive than HD DVD Blu-ray Maprang 10GM
- 29. Easy to carry.
- 30. The design is more fashionable
- 31. Very easily allows you to transport documents from one computer to another.
- 32. It holds a lot more data than a floppy disk.
- 33. Not expensive. Disadvantages - Easily lost because it is small. Memory sticks/Pen drives Maprang 10GM
- 35. Easy to transport data from one to another.
- 37. Easily lost.Flash memory cards Maprang 10GM