Solved

Where does the deleted file go?

Posted on 2007-11-14
8
1,429 Views
Last Modified: 2013-12-27
Where does the deleted file go?
 
As far as I know when a file is deleted it goes to the recycle bin and Where after we empty the recycle bin?

Some time if we delet a file which are of a very large size or from different (external ) media the file cannot be found in the recycle bin.

Even though it is deleted from the recycle bin. how come application can recover it back?

So what happens to a deleted file? Where does it go?

0
Comment
Question by:scoinzen
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
8 Comments
 
LVL 2

Accepted Solution

by:
tryokane earned 250 total points
ID: 20278935
They just delete the entry from your partition table, so that it tells ur computer that now it has that space to use to write more files into it. As long as you don't overwrite that space contain by that data your data usually can still be recovered back.
0
 

Author Comment

by:scoinzen
ID: 20278956
So how much space is allocated for those kind of file(i.e. the deleted files). And how can we be sure if it has been overwritten by another file or not.
0
 
LVL 32

Assisted Solution

by:r-k
r-k earned 250 total points
ID: 20287211
"So how much space is allocated for those kind of file(i.e. the deleted files)."

No space is allocated. The space formerly occupied is marked as "free" (once you empty the recycle bin). As new files are created, one or more will evetually occupy the free space, so after some time the old deleted file can no longer be recovered.

"..how can we be sure if it has been overwritten by another file or not."

You can't be sure, normally. If you want to guarantee that free space has been erased or overwritten, you have to do it yourself by one of two means:

(1) Run a special program, such as DBAN (http://dban.sourceforge.net/) to erase the entire hard drive. Caution: you will lose everything on the disk.

(2) Run a program like SDelete (http://www.microsoft.com/technet/sysinternals/FileAndDisk/SDelete.mspx) to overwrite all free space on disk, leaving the files intact.
0
Ransomware: The New Cyber Threat & How to Stop It

This infographic explains ransomware, type of malware that blocks access to your files or your systems and holds them hostage until a ransom is paid. It also examines the different types of ransomware and explains what you can do to thwart this sinister online threat.  

 

Author Comment

by:scoinzen
ID: 20290159
Thanks r-k. As you've mentioned that we could completely wipe out everything thats in a hard dirve. But looking at some examples, we've seen police recover data and information from a completely formatted and wiped out hard disk. How is it possible.
0
 
LVL 32

Expert Comment

by:r-k
ID: 20290998
"..recover data and information from a completely formatted.."
"How is it possible"

It is possible in those cases where the drive was not securely erased.

You can erase a drive in several ways:

(A) Delete all files on the drive.
(B) Reformat or re-partition the drive.
(C) Low-level format the drive.
(D) Securely erase the drive.
(E) Physically destroy the drive.

As you may guess, the difficulty of recovery increases from (A) to (E). In particular, almost anyone can recover files from a drive where (A) or (B) were used. The FBI may be able to recover a drive where (C) was used. Certainly no one can recover from (E) if the damage is severe enough (e.g. melt the drive).

The question is method (D). In my opinion, even the FBI cannot recover data from a drive that was securely erased. By securely erased, I mean with a program like DBAN (link above). There are others also but DBAN is free and well known.

Of course I don't work for the FBI and can't prove this. This is just my opinion based on experience and knowing how DBAN works.
0
 
LVL 1

Expert Comment

by:Computer101
ID: 20482690
Forced accept.

Computer101
EE Admin
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In our personal lives, we have well-designed consumer apps to delight us and make even the most complex transactions simple. Many enterprise applications, however, are a bit behind the times. For an enterprise app to be successful in today's tech wo…
Invest in your employees with these five simple steps to improve employee engagement and retention.
Using Adobe Premiere Pro, the viewer will learn how to set up a sequence with proper settings, importing pictures, rendering, and exporting the finished product.
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question