RunningMan: Those disc sanders on a drill are dreadful to use - don't even think about using one unless you want big trenches dug in whatever you are sanding!
Go buy the right sander for the job (new, or second hand) - if you don't need it, then sell it after.
Disk sanders like this will not give a consistent finish over a large area. Go buy a proper sander, one the the pad sanders with the pointed front edge will let you get into the corners on your windows, and maybe do the deck. If the deck is a large area you may need to hire a floor sander.
Artificial intelligence is no match, for natural stupidity!