input: [Service] Extra bandwidth (monthly data transfer) and data storage [What We Offer] Our average client has just over 1000 products, uses just 14 GB of monthly bandwidth (data transfer), and consumes about 1 GB of data storage. Most never exceed their plan limits. Regardless, we make sure our overage fees are among the fairest you will find. We offer additional monthly bandwidth for $2/month per Gigabyte. We offer additional disk space for $10/month per Gigabyte. [Common Practice] 
output: Some carts make their overage charges extremely difficult to find, then bill you an outrageous amount if you exceed limits. Make sure you know this amount ahead of time. Some carts do offer "unlimited" storage and bandwidth. We think it's a bit of a marketing ploy, as a vast majority of websites don't use much data. Unlimited data plans seem to correlate with limited feature sets.