I am having one 4gb pendrive its not opening. now im inserting my pc please recover it.

Don't be panic. you can try some data recovery software. You can see
http://www.asoftech.com/adr/index.html
It tells the steps how to perform data recovery.

If above does not work, you may have to format the pen drive (use quick format), and then use above mentioned software to scan again the pen drive and recover your files.

You can very often recover deleted pictures from USB Memory stick. However, to increase the chances of being able to do memory stick recovery after they have been deleted you must not save any new photos, files or data to it.

Find the solutions to recover data from memory stick here:

http://www.any-data-recovery.com/topics/card/memory-stick-recovery.html

Hi Baluobs,
If the USB flash drive shows up in 'my computer' as a drive letter,you can recover your data on it with data recovery software.I have suceed to recover data from pen drive with Tenorshare data recovery.It can recover data after deeply scanning your USB flash drive to look for lost data.
Anyway,download a trial version and scan your USB flash drive for free to preview whether your files can be recovered. http://www.any-data-recovery.com/index.htm
After you recover your data on it,format it to check out whether it can be fixed.

All right! You often could recover inaccessible data from a USB pen drive back for free by applying a drive data recovery freeware:
http://www.geeksdo.com/data-recovery/

If this data recovery freeware doesn't make a sense, you drive may get some problems. You'd better ask an expert for help.
In the future, you should never save the needed data on only one drive.

You 'd better see this article first :
http://www.goshareware.com/resource/pen-drive-data-recovery.html
And hope this will be useful to you.

USB flash drive is widely used for its excellent quality which gives customers all the power and performance you need to transfer, store and share pictures, tunes and data perfectly. And once you accidently deleted data from USB drive, you must be very worry, especially when you deleted or formatted important data. How torecover data from USBthen? It is actually very easy.http://www.card-data-recovery.com/usb-data-recovery.htm

Only 3 steps:

Step I. Download and Install the Program

The program takes very little space, thus the downloading process is very quick.

Step II. Choose Device and File Types to Be Recovered

Specify the device signifying your card in the interface of the software. And then you could choose file types on the right of the interface.

StepIII. Preview and Recover Files

Hi,
Don't worry you can recover your pen drive by using a USB data recovery tool. Previously I used this tool to recover files from corrupted pen drive. You can connect to the computer in which this software is installed and scan it by launching the software. For more details you can visit the below mentioned website.

http://www.recover-data.org/flash-drive.html

Or else you can download the demo tool from the link mentioned below and test the recovery results.

http://www.recover-data.org/download/recover-data.exe

Try Kernel for Windows Data Recovery, It performs fast and flawless data recovery. It also maintains original properties of the files recovered. Free trial version can be downloaded free from http://www.windowsrecoverysoftware.com/ . But, its trial version does not save files. In order to save the files recovered, you need to purchase full version of software.