Military specials if you qualify.
Read all you can about the new fastpass system. In my cursory look, I feel it is squeezing a lot of people out of the popular attractions if you don't book a package early.
The first HD I added has an external powered supply, to my 211K. I then added an external HD to my 211Z in the bedroom, I used a laptop drive in a usb enclosure, no external power supply. Both work fine. I believe all HD have a sleep mode.
Mine is located on our full wall slide. I had to remove the left inside false wall in the bedroom medicine cabinet (removing shelves and top false ceiling). You can then remove the mounting bracket on the top, right rear of the dryer. I removed louver doors, the cross piece which the upper and lower doors latch to. Remove screws attaching dryer to washer brackets. Lift up and forward. I attached a rope line to dryer plug to facilitate re-install. You can loosen dryer vent hose clamp pryer to removal. Helper is handy.
Mine is located on the passenger full wall slide, next to bedroom vanity. I had to remove the insides of the bedroom medicine cabinet to access the mounting screws which were attached to the top rear corner of the dryer. The dryer is attached to the washer by a wide L bracket in the front, and a U bracket in the rear. Removing the screws on the front bracket will allow you to lift the dryer above the bracket and pull forward.
Email firstname.lastname@example.org, they provided me a diagram.