I am trying to install a 500GB HD in my Dell. BIOS recognizes it as 500GB but when I start loading Windows in the partition screen it sees it as 131GB. After Windows loads it still sees it as 131GB. I did format the drive. Dell doesn't list the BIOS upgrade as fixing this problem. Does anyone know how to repair this?

hi!
type this into Start/run , compmgmt.msc , go to disk management in the left pane, and the rest of the drive should show there ,you can activate and format it and use it for storage

I had the same sort of problem, try formatting it with seagate diskwizard then windows will see its full size. then you can partition it

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