It also does NOT show up in Windows 10 Disk Management, but the 860 EVO DOES show up in my Lenovo T520 BIOS as HD2. I have a SATA HD as HD0. BIOS AHCI is enabled.
It was purchased brand new a couple of days ago.
Other than AHCI, the BIOS has a SATA compatibility option. Should I try to enable it, instead of AHCI?
Is this SSD dead?