I want to go back to my data

Twelve years of important photographs...... halp

I partitioned a new 2 tb seagate drive into two NTSF partitions
A partition 1000 gigs or so. B partition about the same
I put 650 gigs of very important photo data on partition B
I decided to make a Raid array with the on board SSD (60 gigs) and the new drive (partition A?)
I made the partition and then loaded a fresh Win 10 OS onto the raid
Part of using Intel Rapid Storage Technology
I come to find out that my original Partition B is...

I want to go back to my data