why i always have a red cross while i am downloading

azn_mafia88

i have read the forum.
/ l  @0 U5 l& Y6 O8 h4 Qtvb now,tvbnow,bttvbthey say the "red cross" mean no space on your computer
! ]9 j" b! [2 Z1 A# Ktvb now,tvbnow,bttvb tvb now,tvbnow,bttvb# Y! G7 N& F$ R8 f. A
but my harddisk is not full...how come it still doing that