In case your hard drive is damaged or corrupted then it is better to have functional copy of the drive where you can store your stuff immediately. Cloning a drive is a good option for handling such situations. Have a look on this tutorial.
How it works*
* Open PDF Form Filler, then open your PDF.
* Click all the fields and checkboxes that need to be filled in to highlight them.
* When all the fields and checkboxes are highlighted, switch to 'Fill Form' mode.
* Enter text in the text fields. Check the boxes.
* Press 'Print' to print your hardcopy.
* Press 'Save' and the form is saved as a new PDF.