Spread your brand name everywhere by distributing promotional 4GB USB flash drives to your customers during any events, exhibitions, trade shows, etc. The USB flash drives are used to store digital data and information and can also be used to transfer or copy files from laptop, computers, etc. There are different diverse categories of USB flash drives such as swivel, credit card shape, pen-shaped, silicone wristband, etc. PapaChina has varieties of 4 GB USB flash drives at wholesale price for its customers, and you can also buy the customize in the best way you want.