You are in heaven as you just signed up for your 1 month free porn subscription, and want to stream and save as much smut your internet link can handle, because you are a lonely looser nerd that needs to stock up on material for the long winter ahead. You run as fast as your legs can carry you to your favourite shop in the whole wide world - Best Buy. But alas - so many options to choose from when trying to buy that huge external hard disk drive.
So you google some products you see and find this:
It bakes your noodle as storing your smut on a Porsche will probably make your subjects want you even more. Anyhow, their description of the product will satisfy your needs:
Speeds up to 5 Gb/s allow you to transfer a 700 MB video file in just under 7 seconds
Excellent! That makes perfect sense. 5Gb/s should allow up to 625MB/s transfer rates (I did say you are a nerd), and 625MB/s means a 700MB video will take 7 seconds... Ummm - wait what? Will it not take 1.12 seconds? Ah but here is the catch... They did say "up to 5Gb/s" - so it is perfectly reasonable to have an actual transfer rate of 700MB in 7 seconds, which is 0.8Gb/s. You happily purchase the hard drive and continue with your sad life, oblivious to the fact that mentioning "up to 5Gb/s" is meaningless if the maximum transfer rate is actually 0.8Gb/s. Why mention a theoretical maximum that is even theoretically unattainable?
Don't you just hate marketing aimed at confusing the non technical few roaming amongst us?