Thanks for the advice [NAME] and [NAME]. I managed to get the 8TB SATA HDD recognised in Windows after running a Windows Memory Diagnostic. Not sure why this had any impact but it was a suggested fix on a number of other forums. Possibly just the fact that the HDD was spinning up for a solid 10 minutes or so during the memory diagnostic did the trick, who knows?
Hi, Having some issues getting a new 8TB SATA HDD recognised in a Dell OptiPlex 3020 Tower. The Toshiba HDD model is: 8TB N300 3.5" (HDWG460UZSVA). This is designed for NAS, but having checked with the vendor it is generally fine for desktop use too. I was planning to use the drive for image backups. The Dell OptiPlex is running Windows 10 Pro v21H2 64-bit, bios A20 The 8TB HDD is recognised in the bios and the sata port is enabled however it isn't recognised in Windows device manager or disk management, so not possible to initialise the disk. I have tried swapping the sata ports and sata cable to no avail. Is the 8 year old OptiPlex 3020 just to old for these high capacity drives?
Dell OptiPlex 3020 Tower & 8TB Internal SATA HDD recognised in bios but not 
Windows