I’m just going to write up a quick article explaining the graphs that I’ve just added to the site. Although I think they are really easy to read - I know a lot of people might wonder what they mean.

So lets start by stating the obvious:

• Storage devices come in vary sizes
• Different size devices have differing ‘price-per-gigabyte’ costs.
• The ‘cost-per-gigabyte’ differs because different sizes are more desirable than others.

For example a 1TB hard drive might be in greater demand than a 500GB. So the price of the 1TB item is more per gigabyte than the 500GB, eg:500GB = £ 50 (cost per gigabyte= £ 0.10)
1TB = £ 120 (cost per gigabyte= £ 0.12)

Now - you may not be too bothered about getting the biggest size hard drive as possible - and so you can pick up a bargain with the 500GB drive. The historical data is useful as you can see prices on ‘premium’ drives (1TB say) dropping, and possibly ‘bargain-basements’ (250GB say) raising, and you should be able to take quite a good guess at when a 1TB drive will become comparatively cheaper than a 500GB.

The idea behind the graphs is they allow you to view the history of the memory card/hard drive/RAM prices - and see the history of each respective data size - eg. 160GB drives might be less desirable than a 320GB, but you can buy 2 and save money.