It may not be obvious where storage fits with Web 2.0. It’s a given that user-generated content – a pillar of Web 2.0 – will increase your storage requirements, possibly in a less predictable way than if all content came via internal systems. But unless you are planning to be the next MySpace or YouTube, that is unlikely to be a big issue.
The impact on storage is quite the reverse. Today on the consumer-facing Web, there are many ways to share information. Web Mail sites like Gmail and Yahoo Mail offer users near unlimited email storage, such that there is hardly any need to delete correspondence, unlike corporate email like Microsoft Exchange, which is crippled by wholly impractical Inbox size limits. The Web 2.0 generation will work around any such limitations. They will expect unlimited storage, accessible via the Internet from any computer, anywhere in the world.