said by tschmidt:You can do all that, or you can just google "
That is a simple calculation.
First convert 50 GB (gigabytes) into 50 gb (gigabits) multiply by 8
You have 400 gb (400,000,000,000) to use per month.
Connect speed is specified in bits per second so you need to determine how many seconds are in a month: 30d x 24h x 60m x 60s
Assuming a 30 day month there are a 2,592,000 seconds per month. If you want to be more conservative use 31 days for a month.
Dividing your cap by seconds per month yields 154.3 kbps.