if you google most PC made , you can find specs,
the HP.com support page has some,
not sure what you want to do or need, me,.
but you SAID, SSD, , is that m.2 card or 2.5" SATA cabled drives?
Re: H8 ssd upgrade (what SDD class do you want:":
first google hit lands here
https://support.hp.com/us-en/document/c03517380
no m.2 cards there.
you can used any SSD, 2.5 " made on earth , no limits, at all. NTFS, for sure GPT mode. 64bit OS.
the limit is Peta bytes, done correctly (formatted)
mobo link1.
6x SATA 2.0 connectors (SATA 0 - 1 @ 6 Gb/s, SATA 2 -5 @ 3 Gb/s)
a 500MB/s drive is easy hit. super easy. go to benchmark SSD page (google that seen it) if speed is your bag, buy the fast one from say Samsung.
NO warranty answers by me.