full lenth movies should be in the neiborhood of 600 to 900 mb ....true dvd quality is around 4 gb...and about the copyright thing everyone shares and d/ls these files anyway...dispite what they may tell you . and yes file size is a verry good indicator of wether or not its a fake...or if you know what extension it is it could just be a torrent for the movie ...or a virus ....or a picture of one scene of the movie or lots of other things...