Hey, thanks and I'm glad you enjoyed that! :-D You can also cut corners in the code in a bunch of spots. I will suggest more in the morning, but basically, in your sclick event, you've got a ton of room for space-saving. Your recursive usage of the $($+(... is completely unnecessary. In other words, you can replace your sclick dialog event with this:

on *:dialog:drive.properties:sclick:*: {
  var %a = did -a drive.properties 5
  if (($did = 4) && ($disk($did(drive.properties,3)))) {
    did -r drive.properties 5
    set %drive $did(drive.properties,3)
    %a Listing %drive Properties
    %a ------------------------
    %a Path: $disk(%drive).path
    %a Type: $disk(%drive).type
    %a Label: $disk(%drive).label
    %a Size: $bytes($disk(%drive).size,g) Gbs
    %a Free: $bytes($disk(%drive).free,g) Gbs
  }
}