The error 0x800701e3 usually indicates hardware failure on the drive.
Connect that drive to your PC.
Right click your Start Button and open Disk Management.
In the bottom pane, right click the partition on that drive and select 'Delete Volume', (please ensure you are working on the correct drive).
That should cause the drive to be marked as 'Unallocated Space'.
Right click that 'Unallocated Space' and select 'New - Simple Volume' and accept the defaults.
When that process completes, are you able to use the drive in File Explorer.