why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.
0 y/ a  G5 L5 S8 Y7 u- w' H- u2 t$ M5.39.217.77:8898they say the "red cross" mean no space on your computer
  D: [$ d' Y" V: x& y* J7 e' j tvb now,tvbnow,bttvb' b8 j2 h6 j" ?" b6 R% F$ B$ I
but my harddisk is not full...how come it still doing that