DVD-ROM (+R,-R and RW):
-DVD-ROM-R they can hold from 4,7GB to 8 or 9MB
- It is like the DVD - ROM (+R,-R) They but , they have different systems of recording
-DVD-ROM RW ( Rewrited):This dvd also many things can be recorded and in addition it is possible to return to record
Pen Drive:
-The have different capacity from 128MB or 2BG,but standard capacity is 1BG or 2 GB.They have nuch more capacity than a floppy disk.
-They are faster and very easy to carry.You can store all kins of files and folders.
-You can store programs,so you can install them in another computer or in pen drive in self.They are become cheap and cheaper day buy day.You can get 2GB for than pendrive than
20 or 30 €.
-You need a USB port.
CD-ROM(+R,-R and RW):
-They can hold from 640MB to 700MB.
-They are usually read-only, but also it is possible to record all kinds of files from folders up to movies.
-CD-ROM RW( Rewraited):This cd also many things can be recorded and in addition it is possible to return to record .
-The CD-ROM-R is in use more.
