I have a 16GB SanDisk pen drive. I purchased it from Paytm Mall before 3 months. I was using it regularly. I transferred files via it and sometimes I listened music in my home theater via It. First 2 month there was no problem. From last month it was shown some problems. It automatically disconnected from my Desktop and sometimes it stopped working. I was confused to see this. I know SanDisk is a big brand but my SanDisk Pendrive is a defective one. As I purchased from online so didn’t got any warranty also. It was so pathetic to me. My Rs 400 is just gone. I contacted with paytm for khow about warranty but they didn’t help me. So friends I recommend you please don’t buy Pendrive from online, buy it from offline stores. That’s my opinion.