When you a delete a file, it is not really erased it continues existing on your hard drive, even after you empty it from the Recycle Bin. The data is most often salvaged from storage media such as internal or external hard disk drives, SSDs, USB flash drives, magnetic tapes, CDs, DVDs, RAID
If the file has been partially overwritten, the file recovery program can only recover part of the data. The most common data recovery scenario involves an operating system failure, malfunction of a storage device, logical failure of storage devices, accidental damage or deletion, etc.
Try these solutions:
If you back up your hard drive or at least your libraries on a regular basis, your files are probably preserved there. I don’t know which backup program you use, so I cannot tell you exactly how to search for and recover the files. It is generally a pretty intuitive process.
Windows stores deleted files here as a safety measure. You’ll find the icon in the upper left corner of your screen.
If you find the files there, select them, right-click them, and choose Restore.
Even a file that’s no longer in the Recycle Bin may still exist. Windows doesn’t overwrite the actual ones and zeros until another file needs the drive space. That’s why I told you to avoid using the PC as much as possible.
There are several good file recovery programs available. I recommend Mini Tool Power Data Recovery. It’s easy to use and has a very good track record. And it sometimes shows you the images that it can recover.
The problem here is that the file formats used by Office applications are extremely complex and not too logical either. For instance, a Word document containing a single word still takes up 20k, as all those other bytes are used to store formatting, view types and even a history of modifications to the document. If you open up such a file in Notepad you’ll realize just how hard it is to piece a document together.
If you can’t afford any of these heavyweight utilities, then you could trim the nonsense yourself using a hex editor. The oddly named ‘XVI32’ is particularly good and can handle large file sizes. Just retrieve what you can from the corrupted file using this utility.
1. If you can open the corrupt file, then saving it using a different file format can filter out some of the junk and present you with more of your original data.
2. There are utilities that can recover more information out of these files, far beyond what Office it can normally do.
3. Failing that, you can always try working your way through the file yourself using the XVI32 hex editor.
Remote recovery requires a stable connection with an adequate bandwidth. However, it is not applicable where access to the hardware is required, as in cases of physical damage.
Recovery experts do not always need to have physical access to the damaged hardware. When the lost data can be recovered by software techniques, they can often perform the recovery using remote access software over the Internet, LAN or other connection to the physical location of the damaged media.
After data has been physically overwritten on a hard disk drive, it is generally assumed that the previous data are no longer possible to recover. In 1996, Peter Gutmann, a computer scientist, presented a paper that suggested overwritten data could be recovered through the use of magnetic force microscope.