Only the pointer or entry from the index table in the File System is removed. Further, wiping is necessary since deletion or formatting does not actually destroy the data from a storage device. Wiping is the most preferred way of data destruction when compared to physical destruction or degaussing, which does the same job but at a much higher expense and also generates a ton of e-waste. Wiping a hard drive means destroying the data from the hard drive permanently by overwriting with a pattern of 0’s and 1’s.
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