How to get the data back?

I accidentally put my passport disk as a recovery drive in win10. I stopped it before it is finished.
And now the 2T is only recognized as 31GB as a new disk in the system. Where are the other data and space? How to restore it back, really in a hurry now?

If you’re in a hurry, then i’m sorry to say that Data Recovery is not a quick process … it will take many many hours, even days to recover data from a 2TB HDD.

Google … “Data Recovery Software” some will be free, most other payware.

If that doesn’t work then you’ll need to contact a Professional Data Recovery Service which will cost you $$$

Always keeping a backup of your data is the cheapest and easiest way to avoid data loss due to “accidents”