What Happens When You Delete & Wipe DATA?

 

What Happens When You Delete & Wipe DATA?

Every time we delete a file from our computer, like magic, it obediently vanishes from the screen. However, not everything is what it seems: on the one hand, there are hardly any changes in the team when we do it and, on the other, as is logical, there is no illusion behind this process.

To begin with, when we save a document on a traditional hard disk, what we actually do is occupy a series of blocks (each of them has about 4 'kilobytes') linked together. Over time, when we decide to end it and order the team to eliminate it, in reality absolutely nothing is deleted.

What happens is very different: "When we delete a file, we go to the first block and make a mark indicating that this file is no longer available ", explains the developer and maker Miguel Ángel López. In addition, the table that the system uses to know the exact location of a document changes. The first character of the file name is modified, and thus it becomes lost for the team. In this way, the deletion process has only been carried out in the eyes of the operating system, which will be unable to find it again (at least, without the help of a recovery 'software').

However, the data is still there, occupying the blocks. But the brand that the first one has also serves to let the team know that they are available. "Thus, when we go to copy another file, if those blocks were adjusted to the new one we want to save, we would use them,” explains López.

It is then that the original file deletion becomes effective: the data will disappear and, instead, the new file will be recorded. In fact, the erasure of the information could be partial. If we end up with a file of, say, two 'gigs', and the team uses its space to save something only one 'gig', the other blocks will remain intact.

Overwrite That Something Remains

Even after all this process, a file may not be permanently deleted. Although this is not what happens, for example, in an SD memory, the classic magnetic hard drives may need several overwrites so that any trace of the deleted file disappears completely.

"Although not with 'software', but by characteristics of the 'hardware', we could see what magnetism the disk has, since it remains a small mark from which the data that was before can be obtained," explains the developer.

Even so, it is better not to rely on the recovery of something that has been deleted and on which other files have already been recorded. After all, rescuing the data on a hard disk from the marks of magnetism is, due to its complexity, something that is within the reach of a few (among which are, of course, the security forces of the State).

Those that have the capacity to do so do so based on magnetic resonance imaging of the hard disk, which allows us to reconstruct the erasure. For example, in the event that an entire disk is formatted through the technique called ’zero filling' (which consists of replacing all the bits of the device recorded as a 1 by a 0); the police could recompose deleted data.

The magnetic operation of a disk is not perfect and, if the zeros and ones are indicated with a horizontal or vertical signal respectively, when converting all the information bits into zeros the signals do not remain exactly the same: those that come, for example, from the vertical position may be slightly tilted. Horizontal enough so that the team interprets them as a 0 but with the necessary slope so that the experts know that there was a 1 there.

Thus, beyond the physical destruction of disks, the best way to completely delete a file is by writing other files in its place. In fact, there are endless 'software' tools that offer to completely eliminate your files: "Some of them erase them by rewriting up to 35 times, depending on how paranoid you have," says Miguel Ángel.

Where absolutely nothing is deleted is in the famous Windows Recycle Bin. Sending something to that directory is nothing more than changing a folder file, modifying its location so that the user himself remembers that he wants to end its existence but without actually doing so. "Windows knows that it is a file that is in the trash and knows that it has to treat it differently, but at the hard disk level there is no change", summarizes López.

What happens when you delete a file from your computer is not magic art, but it is not a foolproof process either. Actually, it may take a long time before you can state outright that you have deleted a file.

How Data Wipe works & Different from Data Deletion

Data Wipe software is used to remove the data permanently so that no one can recover this data. This software helps you to ensure security. Data Wipe ensures that file deletion is immutable and beyond recall.

In the case of any file deletion, deleted file goes into the Recycle bin. If you delete that file from Recycle bin as well, it will still not be completely deleted from your system. Normally, the file name is deleted from the Disk’s index, but all the data remains as it is on the Disk. Some of the Data Recovery Software can recover this data from the Disk. If you overwrite the data, that will also not provide you the guarantee that the data will not be recovered.

If you want to delete the data permanently, you need to overwrite the data many times so that no one can recover it by any means. This software help you to delete the file completely from the system so that no one can recover the file even with the help of any Data Recovery Software. Data Wipe Software is designed with tested algorithms. Tested algorithms help you remove the data from the Disk so that you are ensured that the data deleted will never be recovered.