If you use a Mac, get shootShifter. It lets you arrange by time very easily.
OWC sell a nice USB-C dock that will let you have more drives plugged in at once. You can tell Time Machine what drives and folders to back up.
Are you aware that you can back up external drives with Time Machine?
I also have an aging 27" iMac, and from reading lots of articles think a Mac Studio computer with a Studio monitor would be the best compromise for a new system. External storage is fine and very quick these days. The main thing to consider is that the Apple monitors are superb. I've had quite a few others, and I've never been happy with the color renditions as compared to iMacs. I have not updated as I still have two important programs which will not run on the new models.
Looks like a cosmos to me.
They probably won't sell a lot in the UK with the USA standard screw-in base.
I had one printed by artbeatstudios.com a couple years ago, and it was very well done (and shipped well, too). You need an appropriate photo for it to look good - I had a scene of a breaking ocean wave, but anything with smooth and reflective surfaces should look good (think automobiles). You do not want to print something with texture or hair or fur on metal. Metal prints resemble the look of Cibachrome for those of you who are old enough to remember that process.
I just got a Vizio TV to show photos, and it does, sort of. It is difficult to get it to run correctly, in that it shows photos for 17 seconds when set for 5 seconds, and appears to show the phantom jpg files (as blank images) from my iMac in addition to the real jpg files. I'll try to find a Windows machine to delete the unwanted files from the USB stick, as I can't do it from a Mac. I went with the Vizio as their manuals seemed to indicate they would be a better solution than other brands, but now I'm not too sure about that! I'm very satisfied with the sharpness and color, however.
On a Mac, try using ShootShifter.
Wacom digitizer tablets are the way to go. I've used them for 30 years.
The map looks like a photo of the map in Odysseys Unlimited brochure, or perhaps a Smithsonian brochure, as they use Odysseys trips.
Maybe Movavi screen recorder could work for you.
Probably you press in on the two levers under the lens and then move the lens assembly forward or backward. There may be a scale and pointer near the rails.