My current windows 10 installation wont find my new m.2 drive at but..

i just got a new M.2 drive for my desktop. my current setup is a 100gb 2.5" SSD with my system on it and a 1Tb HDD with the data. I want to transfer windows over from the old 100 gb SSD to my new 256gb m.2 but this windows installation cant see my m.2 for nothing. no device manager, no 3rd party apps no nothing. But my bios can see it fine and i can install windows and boot windows from it too, the drive works. i had a issue with my registry before when i enables raid mode by accident and i had to remove the registry entry to boot up again. In my device manager theirs now a "serial ATA Controller" when i plugged in my m.2 and it cant find any drivers for it but when i boot up from the m.2 i dont have the issue, wheres the driver for this? important specs setup is as follows

motherboard: GA-Z97X-Gaming 3

100GB SSD (system boot)
1Tb (Data storage user profile)

i have moved any ports from sata 4&5 as i was told and i updated my bios.
what can i do about this?

Cliff S said:

Do you have an NVMe driver installed, either Windows default, which is ok, or , the one from the disk manufacturer, which is much better?

m.2 drives and slots can be SATA or NVMe, and in some case the slots can handle both. So an NVMe driver is only applicable if it's an NVMe drive.

Cliff S said:

Also Intel Rapid Storage Technology needs to be installed.
See my post here: Samsung 960 Pro SSD max speed - Page 3 - Windows 10 Forums

Huh? I don't have RST installed, and I'm using two Samsung 950 NVMe drives in my Intel NUC Skull Canyon.

@xdarkmario - Which model drive do you have?

Some boards share a traditional SATA socket with an m.2 slot, so if you already have a drive on the SATA socket, it won't recognize the m.2.

I'm assuming when you install windows on it, you are taking the 100GB drive out? that may suggest the shared conflict I mentioned. Which SATA socket are you installing the 100GB drive in?

Ok, looking at the manual, it looks like you can have either 1 m.2, 1 Sata Express, or 2 Sata3 drives connected to the same channel, but only one of those combinations. The Sata express sockets are the lighter color I believe. It says this:

M.2, SATA Express, and SATA3 4/5 connectors can only be used one at a time. The SATA3 4/5 connectors will become unavailable when an M.2 SSD is installed

It seems to suggest that the m.2 should take priority, but documentation isn't always correct.

it was some kinda registry corruption so i was forces to dirty reinstall.