Try this 1
1) Click on Start --> In search bar, type control folders and press Enter.
"Folder Options" will be opened. Now click on the "View" tab.
2) Select the option "Show hidden files, folders and drives" and uncheck the
check box "Hide protected operating system files" --> Click on OK.
Now look for your files. Later undo the changes that your have made by following
the Step 1 and clicking on the "Restore Defaults" button.
3) If still the files are missing then try the recovery software "Recuva" without
making any changes to that drive and check if you able to find all those file in the
recovery. Click on the below hyperlink "Recuva" and download the file