There are a number of times when a web agency do not know how much capacity is needed to host their customers website. To do so, web agency must know how many email account that will be made and the minimum capacity of each email. If the web agency already know those two elements, then they should do is multiply the number of account and the minimum capacity. Then web agency should ask whether the hosting will be used for their website too or not. If the answer is yes, then the web agency should calculate the needed storage for the website. A normal website, a website that combines flash and fixed design, with CMS for daily updating will only require 100 MB capacity. Based on those two calculations, a web agency can know how much total capacity is needed. But before proposing the number, it is better to add another 50 or 100 MB as a precaution.
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