CD’S and DVD’S are a form of backup. They are cheap to buy but to rewrite on them is impossible. It is possible to use rewritable CD’S and DVD’S, but they’re quite expensive for what they are. The second option is a removable hard drive. This is a divice that can be taken anywhere to backup your data. Third solution : for example a ftp server to back up your files. Its not great though because a lot of space is required sometimes to backup a computer hard-drive. This will probably change in the next few years as technology and avaliability advances.
Removeable media such as DVD’S, CD’S will be obsolete in about five years. This is due to higher bandwidth, i.e. streaming. For example, we are already able to watch a film directly from the Net due to high bandwidth streaming instead of dowloading an entire video file.
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