I just purchased a WD Blue M.2 SSD which is a B+M ssd. My motherboard is the ASUS ROG Strix X470-F Gaming AM4. Are they compatible, or will I have to return the SSD to get one that isnt a B+M?
It's compatible. All the WD Blue M.2 drives are listed on the device suppport list. If it's a NVME version use the top M.2 slot nearest to the CPU socket if it's SATA use the lower slot.