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Question.. When you connect the device to your Surface pro.. And if you go to your windows explorer window where it shows your hard drive, cd drive, and connected devices with removable storage..
Is it showing the drive listed there?
If not, can you see it listed in the diskmgmt.msc interface?
Are you familiar with the command prompt window ( admin ) ?
Good afternoon.. My apologies for the delay in getting back to you.
lets connect the non working drive.
Then open an admin command prompt
type in diskpart then hit enter.
then type in list disk and hit enter
How many disks does it see>?