====== data transfer calculator ======

transfer time calculation 

From: http://techinternets.com/copy_calc?do

<code>
This File Transfer Time Calculator is used to determine the approximate time that a file would take to 
transfer over a particular interface . The speeds are optimistic because the actual inferface will be 
slowed down by overhead (ex: requests for the information, syncs, ...), more than one transfer at a 
time, and the interface not performing at the standard speed.
Some Similar Tools:
http://www.t1shopper.com/tools/calculate/downloadcalculator.php
http://www.ibeast.com/content/tools/band-calc.asp
*2From USB3.0 specification: "it is realistic for 400 MBps or more to be delivered to an 
application." - from section: 4.4.11 Efficiency
This tool has served 480589 requests since April 6, 2013.
</code>