Recently upgraded the storage on my pc with a new SSD (Samsung 860 EVO) and HDD (Toshiba x300). The SSD arrived so I put it in and got everything working fine. HDD arrived two days later. I hooked it up but it wasn't showing up, so I restarted my computer. When it rebooted the HDD was showing up but the new SSD was nowhere to be found. Seems like they basically traded places.