I don't know which version, but it worked perfectly with the 3600, so it should already be 4.2, and if it is, a bios update is done in no time. But I would rather recommend a B550 for the CPU.

No

https://www.asrock.com/mb/AMD/B450M-HDV%20R4.0/index.asp#Specification

Well, I used this motherboard with a 3600x, so it is certainly 3rd gen compatible, even without flash in my case. Unfortunately, I don't know which bios version was installed.

Saletti Yes, 1st Gen Ryzen go too. See: https://www.asrock.com/MB/AMD/B450M-HDV%20R4.0/index.asp#CPU Have fun. I've been using the board for several months now and for the price I'm really satisfied.

Hello, it has 4x SATA3, 1x Ultra M.2, max 32GB Ram.

The 3200 mhz only describes the maximum clock speed of the RAM, which is lower and DDR4 can be installed.