@masterbuck @kev @ikt >you can download 6 GB in under 12 minutes.
That's assuming no overhead and no retransmissions.

Assuming 6% overhead (arbitrarily chosen - generally overhead due to HTTP would be at least 10% I guess, but 70Mbit/second is entirely artificial throttling, considering 100BASE-TX is 27+ years old and 1000BASE-T is 25+ years old).

Calculating with GNU units;
You have: (70Mbit * 0.94)/second
You want: minutes/6GB
reciprocal conversion
* 12.1580547112462
So, it would take over 12 minutes, which is more than a ⅙th of an hour.

For 6GiB files (i.e. the proper gigabyte, also known as gibibyte that works out to);
You have: (70Mbit * 0.94)/second
You want: minutes/6GiB
reciprocal conversion
* 13.0546118419453