Download Aomei Partition Assistant as dc3 suggested. Install and run the partition recovery wizard. Do a Fast Search on the whole disk. Does it detect a partition? Please post a screenshot of partitions found. You can use the snipping tool and then attach to your post. Use More Reply Options to show the attachement.
Partition Wizard also can be used but another poster with a similar problem had an issue with it. It would not allow Apply to be clicked after the partition was found. We eventually used TestDisk to copy the files back to the internal drive.
Edit: If a partition is found using fast search click on it to highlight and then the Explore this partition button. Can you explore all files/folders?
Edited by JohnC_21, 05 September 2016 - 11:10 AM.