Thank you very much for your response to my email. I will look into it. In the meanwhile, I have a 8 TB SATA Seagate external USB drive that works just fine on this system for my backup however the internal 4TB m.2 NVMe is the one that seems to have some issues even using a USB enclosure. Would they behave differently between m.2 vs SATA/USB? Thanks again for your response.