For those who don't know what it is, the bandwidth is the quantity of data your website can download/upload per month. This is important because when your website will grow in popularity, it will use more and more bandwidth. You have to know that every time a user load one of your web pages, even if they don't download anything, it takes some bandwidth. The day your web site's bandwidth will reach the maximum allocation, no more visitors will be able to enter your website until the next month. It can result in the lost of your most faithful visitors or potential customers for your e-commerce website. If you can, try to choose a hosting provider that offers you unlimited bandwidth so you won't have to bother about that anymore.
If the refund policy is a days Contabo money back guarantee you can ask for refund if you decided that the hosting is not suitable for you. However, do read the Terms and Conditions carefully.
Storage Space: This is similar to your computer storage. The storage space offered by the hosting provider should be able to accommodate all the files of your web site. The more the storage offered the better. These days a lot of hosting providers offer a few Giga Bytes of storage.
Added Features: Instant Install is a feature offered by most web hosts these days even if they call it another name. It's an automated process for installing databases and database driven features you can add to your website like photo galleries, forums, blogs, content management systems, calendars, guestbooks, and more. It's just as easy to choose a web-hosting provider that gives you these features in case you need them as it is to choose one that doesn't. Again, room to grow is important.
Help Tools - You won't always have to spend your time contacting your web hosting company if they have tools setup that allow you to look up a quick answer to your question. Seek out a web hosting company who has their own wiki, knowledge base and user community.
Disk space is the storage space your web hosting provider allows you for all the files that make up your website (from image galleries to databases to HTML and ASP docs, etc.). Bandwidth is the amount of data transfer your web hosting provider permits you in a given period (usually a month). It's disk space that determines how rich and elaborate your site can be. here It's bandwidth that determines how much traffic you can accommodate. Gauge properly for the best results -- in other words, don't spend a bundle for more than you need, but get yourself more than enough to allow for the traffic (and the growth) you anticipate in your best-case scenarios.
Keep your old web hosting account going for at least another week or two to ensure that all the gremlins are ironed out and that the DNS propagation has taken place properly.