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If chkdsk /f h: doesn't work, you may format it and then recover your files by a recovery software like 'recover my files'

Follow these steps, and your problem will be solved:
1. Go to Run by pressing 'Windows' + 'R'
2. Write 'cmd'
3. Now write 'chkdsk /f h:'
('H' is the name of your hard drive)
Follow ordinary...