why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.
) Z9 U6 c* H! a. G% W" @; Ythey say the "red cross" mean no space on your computer
4 `" ?8 C% }' q9 p4 g2 o! s1 Q公仔箱論壇 3 L' i2 c) C- }) ?# |
but my harddisk is not full...how come it still doing that