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Diskettes |
These are traditional diskettes with a storage capacity of 1.44MB. They are ideal for transferring small amounts of data like Word or Excel files.
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CD |
These have a storage capacity of approximately 700MB. CD-Rs can be used for storing data permanently, as they only record once. CD-RWs allow you to record up to 1000 times, but are only compatible with certain CD-RW drives. A 4x-10x CD-RW is compatible with CD-RW 10x drives and higher because it is the recording speed (second figure) that is measured.
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DVD |
Storage capacity of up to 4.7GB. DVD recording ability, like CD, is R for record once and RW for multiple recording. The difference between + and - is in the way the DVD records the data and DVD drives/players may be compatible with either +/- or both. Dual layered DVDs have two layers of recording surface on a single side which nearly doubles capacity, but are only compatible with a dual layered drive.
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Blu-ray+ HD DVD |
| Blu-ray discs get their name from blue laser technology and HD DVD stands for 'High-density Digital Versatile Disc'. Both use the same blue laser which have a shorter wave length compared to DVD which uses red laser technology. This vastly increases the amount of data on the disc. Capable of recording, rewriting and playback of high definition video, discs are capable of recording more than 2 hours of high definition programming. |
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USB Drives |
| Storage capacity of up to 4GB. This is an easy way to save data, simply plug and play using the USB connection, which also means a quick recording time. Ideal for storing large files, eg. photos, music, presentations and other digital files |
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External Hard Drives |
| Storage capacity above 120GB. Ideal for those who require extra storage space for their PCs or laptops. Connected by the USB port but powered by the mains. |
