It’s a sickening feeling, the moment you realize that some important document, or irreplaceable photos have vanished from your computer.
The chances are that the data is still present, even if you know you deleted it.
Your computer operating system just does not know how to find it any more.
The four most common reasons for data loss are:
- Deletion. You deleted the file by accident during a disk cleanup, or because you thought it was no longer required. It is not in the Recycle Bin. However, the data will still exist until the space it occupied on the disk is are-used by another file.
- Overwriting. You saved a new file over the top of the old one. However, the old data may still exist, and be recoverable.
- File system corruption. The disk suddenly appears empty, or the file and folder names contain gibberish. The files probably still exist, but the pointers to them have been lost or corrupted and the operating system cannot find them.
- Physical damage or hardware failure. You receive error messages when you try to read the disk, or it is not recognised by the computer at all. The data is still likely to be present on the disk itself, but the drive is incapable of accessing it.
In each case, there is a good chance that the data still exists. The computer operating system isn’t able to see it, but data recovery software may be able to.
If the problem is a hardware failure then a data recovery service may be able to get back the data using special equipment.