Can someone tell me how a data recovery software actually works?

Q. I've a presentation tomorrow in which I have to tell how a data recovery software works in a nutshell. How it traverses through HD, how it judges whether the data is a complete file or Allocation Table....? How it tells what's the file extension? etc
Plz tell if you have relevant information... best answer gets 10 points!

A. My friend its a very big process to explain how recovery data software works.But one thing i know that when data is lost it can be recovered by data recovery services. One of my friend use the data recovery service to recovery his lost data fro http://www.recovermypc.com/

What are the names of all the Flash Drive data recovery software you know?
Q. What are the names of all Flash Drive data recovery softwares that I can download?

A. Use data recovery software from stellar data recovery to recover the data from flash drive

What is the best but free useable data recovery software.?
Q. I have used many data recovery software that can be download free. but can't be utilized free... during the process it need to purchase.

A. hi,
i use this tool for recovering data..its not so expensive..named Advanced Disk Recovery..this can deep scan & show u the results of deleted data..
then u can recover it..!!this is the best data recovery i used so far..!!




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