it is actually possible to legally download that much(40 gb in day is... idk). my highest bandwith usage was like 180gb a month, more than half of that(i guess it was ~110 gb) was downloaded from Steam. remaining part is my regular monthly usage(50 to 80 gb.). I have no idea what i download that much.[btw, 3 pcs are connected to internet(same connection), 2 are regularly used.]

my highest upload was around 60gb.(It was not illeagal tprrent seeding). It was one of the months that i needed to send in yearly/monthly projects, it was quite large in size and uploaded several times.