A few suggestions:
1) If you have an unused hard drive somewhere it can be made in to an external drive with an enclosure. These run about $20-$30.
2) Wait for Cyber Monday. External hard drives are near always one of the items that go on sale.
Websites are hosted on the cloud on internet.
If you wish to buy a hard drive, you can try amazon or ebay or go to a local IT mall and shop.
Search with Bing or Google or ?