If the drive was wiped clean as you say, it may need to be formatted in order for your computer to recognize it. This may require pulling the drive from its enclosure. Before formatting, you may wish to explore data recovery.
I am sure some folks here will know about data recovery links that may help, but of course there is no guarantee you will get your data back. This is unfortunate, it looks like you were counting on this drive as your backup. It sounds like a newer drive at 2 TB, so I assume it is under warranty.