M.2(M) vs M.2(B+M): whats the difference?

[TwistedHalo]

So im about to build my first pc and im currently deciding on my storage. I already know i want a m.2 ssd to install windows onl. pcpartpicker has 2 different m.2 choices, m.2(M) and m.2(B+M), and i was just wondering whats the difference?

[vorticalbox]

https://en.m.wikipedia.org/wiki/M.2

[TwistedHalo]

20 minutes ago, vorticalbox said:

https://en.m.wikipedia.org/wiki/M.2

Do you know of any videos that could explain this simpler?

[TwistedHalo]

20 minutes ago, vorticalbox said:

https://en.m.wikipedia.org/wiki/M.2

Do you know of any videos that could explain this simpler?