External Hard Disk Not Recognized

In the information age, computer and those relevant equipments are playing very crucial roles in our lives. And people are choosing different ways to keep their files. As a result external hard disk and similar device as USB flash drives seized a stage to perform their functions. We often use these external data storage devices to keep our data as a backup or as a tool for file transfer. However, sometimes when you connect the USB flash drives or external hard disks to computer, the system can not detect them.

"I reserved my study materials on my USB flash drive, but this morning when I put it on my pc, it said that the USB flash drive can not be opened since the file system of external disk is RAW. This is the first time that my drive did not work well, which is so strange. I had all my stuff on it, so it is very important. How can I do to find them back?"

Under this kind of circumstance if you want to retrieve your external USB drive you should apply external USB drive recovery software.

External hard disk drive or external USB flash drive recovery softwares!

External hard disk drive recovery softwares are aimed to help computer retrieving the undetected external data storage devices. Now they are prevailed and captured a great deal of good reputations, people are very satisfied of its quality and efficiency.

Firstly, by using this software you can help computer system to identify the external hard disk or USB flash drive.

These softwares are efficient for many makes of external hard disk and USB flash drives.(Kingston, Samsung, Transcend, SanDisk USB drive and so on)

Also the files on them can be found, the softwares are planed to recover many types of files by its mighty scanning function with the assistance of inside algorithm. For instance, music(mp3, wma,wav), documents(word document, pdf, excel), videos(avi, rmvb, flv), email archives, zip archives and so on.

The softwares are useful for either all of Windows system editions( windows 7, window XP, windows 8) and all the Mac systems(Mac G5, Mac OS, Mac OS X), which is convenient and practical.

One of the most excellent abilities of external hard disk or USB flash drive recovery softwares is creating "Disk Image" files. This function implements by steering clear of the bad sectors and restore the data from these disk images. And it is possible that you can first preview the files you want from affected drives before you virtually retrieve them back on your drives.

They are capable to recognise the bad USB drives (even is RAW file system) swiftly and retrieve them.

Other data storage devices like memory sticks, various categories of cards, pen drives as well as thumb drives are also covered by external hard disk recovery softwares.

Why computer can not recognize the external hard disks or USB drives?

1.Corruptions of external data storage devices

If your external hard disk or USB drives is corrupted, then it is hard to get entry to the drives. Because the files system which is provided for allocation data is damaged, that is the answer why the drives are useless.

2. Conversion errors

The information on the drives can be disappeared attributes to the errors from converting data.( external hard disk is converted from dynamic to basic or the other way around)

3.Wrong manipulations

The inappropriate actions such as drawing off the drives from computer directly or abruptly shutdown the pc during the process of drives could cause the corruptions of drives.

4.Virus invasion

Using external hard disk or USB flash drives under the situation that the computer is already influenced by virus or putting virulent files on the drives can all lead to the consequence.

Note:

Stop writing anything or put any files on the impaired drives at once when you figured out that there are already some data got lost. Otherwise the lost infos can not be found back.

If the external hard disk can be recognized under Disk Management, you can try to format the external hard disk when data has been restored.