How can i upgrade my hdd

[zloi_templar]

Hello, i have HP — 15-bs172ur laptop. I don't want to showdown it and want to know: have it m2?
Which type of ssd can i buy (key M or key B+m or 2.5?)

[Huffer]

English translation here is not perfect but here is the Service Manual for that model laptop:

Manual 

There is a slot for a SATA type M.2 SSD more than likely. Since your laptop is at the low end hardware wise I am not going to guarantee the slot is present but if it is it looks like this:

M.2 slot in red circle

As stated, this will be a SATA M.2 likely B + M keyed. Post back with any more questions and please accept as solution if this is the info you needed. 

[zloi_templar]

Ty, i find pic of my laptop and this slot look strange. M2 ssd must touch other hardware, plus slot look like slot for "m key", not nvme ssd

[Huffer · Accepted solution]

The slot is present. See this:

The gold leads of the SSD plug in at the botrtom in the black thing and it attaches with the screw at the top.

See the red rectangle. Just plug the SSD in over the top of the cables and fasten it down with the screw. All M.2 slots look the same. They have two chambers like that. A "B + M" or "M only" keyed SSD will fit in there, but in your case only a SATA, which are almost all B + M will be recognized by your system. Samsung 860 Evo or WD Blue M.2 are good choices. 

[zloi_templar]

thank you for help, samsung 860 evo is really good. it's a pity that i can't put samsung 970 or wd black)