text: how long is 300mb in terms of hourly usage throughout a day? i need to know exactly how much time is 300mb worth per day on the internet? thanks so much!! question can't be answered as phrased. it depends on the bandwidth you have coming in to a server and the bandwidth available to the client.  for a t3-connected server and a 256k dsl modem, 300mb of data transfer would be used up in about an hour at continuous peak throughput of the client. if that's what you mean.