Buyer beware of the “overselling” business model – Anyone can promise to sell any amount of space at any price. But we all know that you will use only a small fraction of it.
Under a shared hosting environment, a single server hosts many domain names at the same time. All server resources – space, memory, bandwidth, processing power – are in fact limited.
If you indeed use a lot of space, chances are you will be using so much server resources that your hosting can be suspended because your usage affects the server performance, slows down and even causes problems to other domain names.
Read the fine print!