I am using SanDisk pen drives from a very long time and I had not find any problems with their pen drives.Their pen drives are light in weight as compared to other company’s pen drives. Their pen drives are also faster than other pen drives. Their pen drives do not catch virus easily. Their pen drives are available in every technical or mobile shopes and are quite cheaper than other brands pen drives. They are also quite hard in terms of their material or outer body , as they do not break very easily. San Disk pen drives are best.