This happened to me last year with another 3 TB disk under almost the same circumstances and I was able to fix it without any data loss or recovery tools, but for the life of me I cannot remember how I did it.
Below is a screenshot of the results of a Partition Recovery Scan in Minitool. If you would like a screenshot of just the disk behind the scan, please let me know, and I really hope someone can help me. Thanks.
I mean I was able to fix it with Minitool without data loss, sorry. Just want to be clear.
I should also reveal that the drive letter (J:) is still visible, as well.
Edited by UncleVanya, 20 May 2017 - 10:51 PM.