![]() This is how specialized software can recover delete data. This means that it is possible to recover a deleted file, since its data weren’t really removed from the disk. Instead, it simply removes the file name from the directory where the file is located and mark the sectors the file was using as available space. To really delete this file from the disk, the operating system would have to fill with zeros (or any other value) all sectors occupied by this file. ![]() Imagine a large file that occupies lots of sectors on the hard drive. The operating system acts like that in order to save time. In other words, the operating system doesn’t “zero” (i.e., doesn’t clean) the space the file was using. The operating system simply remove it from the file list and makes the space the file was using available for new data to be written. A lot of people don’t know, but when we delete a file from a computer, it isn’t really deleted.
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