Oh, I should add - the reason I got a My Cloud in the first place is because I have a decently large blu-ray and DVD collection, and it was bugging me that it was so easy to stream Netflix or Amazon or whatever on any computer or TV in the house, but I could only watch physical media on the one TV in the living room with a disk player. So I ripped all those disks on my PC and stuck them on the My Cloud, and it meant that every device in the house could "watch a DVD" by streaming the rip off that just as easily as watching something on Netflix.
Might not be something you're interested in, but I know a few people who have wanted to get rid of all their physical media like DVDs and CDs in recent years to reduce clutter. YouTube Music is genuinely fantastic for making it easy when it comes to CDs - you just stick one you have in (or show it some music files you have on your computer, bought on iTunes for example) and it goes "Ah, you own that? Sweet, you can stream that now everywhere you go." There isn't anything like that for movies, though, and it pisses me off that the expectation is that you need to rebuy stuff off iTunes or Amazon Prime that you already paid for once - but now I can buy something once and watch it on every device, anywhere in the world.