For requirement of data recovery from hard drive which is caused externally you can use the normal simple method of retrieving data which only impairs. The simplest recovery is the one in which the recovering process is done externally to the USB, Firewire etc., in all of which the data is not accessible directly and not through normal manner. Along with such checks, you can also opt for software which may help you in recovering .There are number of crash drive recovery software which are on the market ,those which are good while others are not. There is some other software which has been developed specially for gaining prevention before itself and they do not do the actual recovery process. One important thing to be careful, is some software which can even delete the data present in the hard drive permanently .You need to be on guard, the software that you deploy doesn't harm your hard drive and make the data loss and it should have a small disk impression. According to the specialist the appropriate recovery software even need not be installed in your computer, as it can run from the CD or floppy itself. Some of the companies who recover the hard drive use to provide same stimulated service after the rating process which makes the users' hard drive ready for recovery, thus getting the recovery line by which they try not to lose their customer. Data safety In each hard drive recovery, the technician will first think about how safe is the data and apply the recovery procedures only based upon its safety. If you have ever been in a position that you were working urgently in a project and the computer suddenly shut down by itself. You will then try to reboot the computer, then it will display the message that no hard drive found. Then only you will get to know that the problem is with hard drive and you need to retrieve the data as soon as possible. Free Hard Drive Data Recovery Software If you happen to lose your data unknowingly by deletion or when your file get spoilt, you can be assured that there are lot of free software that are available in the market .All these software recovery tools were designed as wee;; as created to assist you in recovering the files lost and even they will help you in getting back your hard drive as it was before.