copy and paste into remotes , then type in /ds /ds2 in any open channel window and it will show the active channel your drive space for C:\ & D:\

alter as needed .

alias ds {
  describe # disk: (C:\) $disk(C:\).label
  describe # size: $disk(C:\).size $bytes($disk(C:\).size),g).suf $+ GB
  describe # free: $disk(C:\).free $bytes($disk(C:\).free),g).suf $+ GB
  describe # type: $disk(C:\).type
}

alias ds2 {
  describe # disk: (D:\) $disk(D:\).label
  describe # size: $disk(D:\).size $bytes($disk(D:\).size),g).suf $+ GB
  describe # free: $disk(D:\).free $bytes($disk(D:\).free),g).suf $+ GB
  describe # type: $disk(D:\).type
}