I was planning to shift from Windows 10 to Ubuntu. Usually when you install new version of Windows, you do that in C:/ drive.(100GB) The other drives (d:/ and e:/) about 350GB are are not touched.
So when I tried to install Ubuntu.. I did guess a question of formatting the disk. But little did I know that the whole Hard drive will be formatted. After installing Ubuntu, all my data from d:/ and e:/ are also erased. Somebody please help me out. :( :(