Delete a file and empty the Recycle Bin, and only its entry is removed. The data remains on the disk until something else writes over it, so a free recovery app may still bring it back months later. SoftOrbits file shredder software overwrites that data deliberately. It fills every byte the file used with zeros, random data or a named standard pattern, then removes the entry. On a hard drive, a later recovery scan sees the pattern instead of the file.