How can I get back the data of hard disk on Ubuntu 16.04 LTS?

I was trying to install the Windows version next to Ubuntu on the hard disk with the knowledge that Ubuntu is very hard on SSD Jet Jet Windows version on the hard disk Format work for all the data to it and I do not know how to return the data can be as long as I can help me return it Tani and no solution and everything Permanently delete ??