Upgrading mb questions

Dec 17, 2018
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Upgrading from a prebuilt h370 mb to a gigabyte z370. My windows is in my m.2 ssd so I shouldn’t have to worry about that part correct? And curious on the bios stuff looked online but haven’t found a good tutorial or much on google. Will I have to get into updating bios or anything like that? I figured since I had my os on the ssd it’d just be like replacing and should boot right up? Any info helps thank you!
 
Ok so I need to backup my hard drive and the ssd? I can just put all that into a memory stick right? Slightly new to the building of pcs don’t really understand software stuff that we’ll. If there’s a tutorial you know of online maybe? I could probably just google it. I tried googling things to do when replacing motherboard and none of them gave me really anything like that cause I couldn’t find anything specific to what I’m doing.