WD Elements appears without a drive letter

I can see this connected using Data Lifeguard and Computer Management>Storage>Disk Management but in both cases the Elements disk appears with no drive letter and it will not let me assign one. I’m running Win XP but can try Win 7 or Win 10 if you think these would work better.

First you should try to reformat the drive in appropriate supported file format then assign drive letter. You may refer this KBA for more assistance: