Question please help

Mar 14, 2019
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okay so i just got my new pc long story made short: i wanted to build pc i failed someones fixed for me.
but the ones who fixed it i only gave the ssd not my hdd from other pc wich is broken now (not the hhd) and now i installed windows and everything on the ssd and i was wondering can i just put the hdd in my pc? or something even know it also has windows on it? will it then use the hdd or ssd? or will it just use ssd and have hdd as second drive?
or if not how do i get my hdd in my pc ? when it has windows aswell?
or do i need to buy a completly new one for its to work?

i havent tried to plug in my hdd to the computer. but the ssd there
hope i have given enough info pleasee help