According to my information, either a Seagate ST4000LM016 or ST4000LM024 is installed here. Depending on what was available at the time of production.

I bought the 4 TB version. The HD has a driver on it that allows writing and reading on Mac OS. Maxtor is better than Seagate in this respect. At the same time I had bought a 4TB from Seagate, which didn't have the driver. But it worked because I had installed the Maxtor driver shortly before.

It is 1 plate. The case is approx. 19mm high.

Yes, of course. The USB 3.0 port of the hard disk is of course compatible with Windows 10.