Hardware Scan - Hard Drive Failure

Your Drive is Dead.  You didn't say what model Dell you have.

Time for a new one either a 3.5 or 2.5

https://www.amazon.com/Seagate-BarraCuda-Internal-Drive-3-5-Inch/dp/B07H2RR55Q/

https://www.amazon.com/Seagate-BarraCuda-Internal-Drive-2-5-Inch/dp/B07D99S8Z7

SMART Short Self Test Failed - (Error code: WHD16-8NR)

SMART Failure Predicted On Hard Disk

WARNING:

Immediately back-up your data and replace your hard disk drive  failure may be imminent.

Thanks. The model is Inspiron 3668. 

Thanks. The model is Inspiron 368.