If you here 32GB USB drive is 200 rupees, 16GB USB drive is 100 rupees and 8GB USB is 50rupees. then don't bother them. Because in such drives most of them won't work properly and some won't work at all. We need to know that such kind of drves are not been released by the companies.We should keep this point in our mind. The Pen drive which they sell in electronic shopes, they may cheat us. Delhi cop have found these 454 duplicate USB's , memory cards in four shops in their enquiry. So how to find these duplicate memory cards and pendrives. Let see now.

1. If we scratch the company logo on the pen drive ,then if the logo got removed then it is duplicate. because the company logo on original pendrive will not get scratched and removed.

2. Compare to the original pendrives, the duplicate pendrives will be light in weight and the cheap plastic is used.

3. If we examine the pen drive, the company package of the fake drive will not look as a company product. It will look as if it is made in home.

4. Before purchasing the pen drive, we should check the pendrive by connecting to computer. when we connect the pen drive to the computer then it will show the company name tray. and immediately the drive will be installed.Then goto my computer and the drive which you find new there .Right click on that and then click on format.Now click on quick formate and formate it with start. Now  again right click on the drive and then goto properties and check used space and free space.For example, if we purchase 4 GB drive then 3.74 GB is free space.

5.Copy any data in the pendrive. and then open the data in the pendrive.In duplicate pendrives, the data gets copied but it wont open in the pendrive and it shows corrupted error in red color.