Determining recovered file quality is pretty straightforward, here are a few suggestions.

If you have deleted files, then you may obtain  activation by visiting the free activation page. Visit our website and click the ‘free’ product version you want.

Another other method of determining file quality is to use the ‘preview’ option from the files list.
Not all file types will preview, but a great way to determine the general file quality will be to review gif and jpg files. If you’re familiar with the file structure of non-preview-able files, or you know the contents of the file (like a MS Word file), then previewing it will show you the contents of it.