Some storage devices can access data very quickly, whilst others are extremely slow...
* Note: Modern back-up tapes have very fast access speeds, but only to save/read data sequentially (they are serial access devices). Tapes are very slow if you want to read files out of order, since the tape has to be rewound and fast-forwarded.
Access speeds are measured in bytes per second (Bps).
Slow devices have speeds measured in thousands of Bps (kBps).
E.g. a floppy disc can save/read data at a speed of 60kBps
Fast devices have speeds measured in millions of Bps (MBps).
E.g. a hard-drive can save/read data at a speed of 300MBps (5000 times quicker than the floppy!)
This site took quite a bit of time and effort to create, and it costs me money to keep it up and running. If the site has helped you, please consider showing your appreciation by donating a little towards the site's running costs.