yes, the reason I bring out this topic is simple because a customer usually easy to confuse the term "space" and "bandwidth".
Even if you really want to investigate this term into further details, the disk space can be categorized again futhers:
1. Disk space in your IIS server
2. Disk space in your Mail server
3. Disk space in your Database server.
Usually, a web hosting company may offer huge amount of disk space for IIS server, but NOT for mail and database? Why? This is simply because mail and database server require extra license and it means more spending $$$ for the hosting company.
Another thing, I hate to use the word "unlimited bandwidth", "unlimited space" --> this is unreasonable as even the sky has the limit. Please BEWARE with the company which offers "unlimited bandwidth" OR "unlimited space".
If you go to computer shop wanting to buy a PC, can you ask a shopkeeper to give you "unlimited hard drive space"? It is unreasonable, isn;t it?
Hope this helps you guys....