I recently did a clean install of Windows 10 to fix what I thought were some graphics driver issues, and to give myself a fresh start for diagnostics. Everything went fine in that regard. My boot drive showed up, as well as my oldest hard drive. I booted into Windows 10, but two of my drives are missing, along with all the files on them. I didn't format them or delete their partitions when I reinstalled, not wanting to lose their data. I found my old drive present, along with my freshly formatted boot drive, but none of the others. I checked device manager, and they are present, but they don't show up in either File Explorer or Disk Management.