New Computer can npt open External Drive

My old computer XP hard drive died. However just before I backed up with a 500 GB portable…now  have a Windows 8 and can not open the drive on this new computer…how do I get to my files?

Does the drive show in Disk management?

Joe

So …hooked up the old computer which went through all check discs…bless it’s heart - it opened …I copied all files needed to the WD…now I can use as a large flash drive…works for me…then the computer truly died blanked out