Have an NUC8i7BEH with a Samsung SSD 970 EVO M.2 installed. Purchased a Crucial MX500 Sata 2.5 SSD 500 gb for additional storage. Both SSD appear in device manager. However, it does not recognise the Crucial MX500 for use. Any ideas?
You say it shows up in Device Manager. Does it show up in Disk Manager? Right-click on the Windows Start button and select Disk Management.
If it is working properly, it should offer to initialize the drive. Let it do so and then create a Simple Volume encompassing the drive. It should then be accessible from File Manager.
Hope this helps,