If you own a hosting account elsewhere, and you'll like to move it to us (thank you!), We'll be glad to have you on board. Migrating your site is a totally painless process.
Unlimited hosting is a type of hosting with no restriction on disc space and bandwidth usage. It is worth bearing in mind, that the utilization of the resources for each hosting plan must be in accordance with our acceptable usage policy. Essentially, as long as you don't attempt to abuse the unlimited offer, you shouldn't have any issues.