So, the problem began when you went over 2tb?
I think there is a bigger problem here. Before even verifying the drive was intact and was operating correctly, you began installing other software and changing your configuration.
Before you go any further, take your drive to a service center that does data recovery. If your data is that important, you will want to do this. It will be almost impossible for someone to step you through any configuration and setup at this point.
You may also want to review this: https://support.microsoft.com/en-us/kb/2581408
Just my opinion.
Yes the problem did occurred when i passed the 2.2 tb storage.were should i take it ?? i live in albania mate.even this hdd that i bought it is very very expensive here.i want those datas bcs i have a lot of tutorials,online courses by anyfield of knowledge we a lot of ebooks .i reviewed the link and it was helpful on remainding me that the next time i will format it i will partition.until next format im hoping to get my data back or at least to have my hdd in the previous form and to make a partition .