Originally Posted by
xindralol
you always lose data if you copy files ... a good way to imagine this is mp3s - before there were mp3s a much larger spectrum of sound waves was recorded - the reason (among other coding techniques) mp3 files are so small is because they only save what we can actually hear. now if you copy an mp3, and a certain note (it's more complicated but "note" suffices for this) is not copied correctly, the computer will look at preceding / following notes to correct the one it doesn't have. usually it's unnoticable though. all wired/wireless internet connections also lose data btw - and a lower signal (say 34% or w/e it says), while usually unnoticable, requires more data to be re-sent, but since it's very fast and the computer does that automatically you usually won't notice it