That’s indeed an M.2 SSD but you’ll need an adapter as the one that came with the Macbook uses a proprietary connector.

Late answer, but it seems like there’s replacement parts for the corners now. I don’t know how to replace them, though.

Please ask this kind of question in the Answers forum.

If you’re referring to the charging coil, there’s a high chance the coil is toast at some part. The USB port might work again if you clean it with Isopropyl Alcohol with a swab or raising the “tongue“ part of the socket.

Please ask this kind of question in the Answers forum.

Disassembling the phone should reveal the broken stylus inside, although it may be a bit stuck when you try to separate the midframe.

It looks like the cable, if not an antenna itself, connects to a part of the phone which is an antenna sticking in the plastic part of the bezel. It is doable, but it’ll look a bit ridiculous.

So far I remember, the charging coils are sitting on top of the battery, sandwiched between the back panel. Probably covered because of different variants.

Please ask this kind of question in the Answers forum.

Although a glass replacement is possible, it won’t be worth because a small mistake (too much heat, too much force, etc) can potentially damage the AMOLED panel or Digitizer.

Please ask this kind of question in the Answers forum.

As a quick answer, phones nowadays store files on a chip called an eMMC chip. In the case of the Note5, it’s a UFS-II chip.