... offering the most competitive prices.2. Superior quality, each USB flash drive undergoes stringent testing to guarantee its memory space and ... to Shenzhen Worthspark CO.,LtdShenzhen Worthspark Co.,Ltd. is USB Flash Drive and power bank developing, manufacturing and marketing company. After ... is the brand of your USB chip ?We usually use Toshiba, Samsung, Hynix ,Micron, Intel chip ,all the chip pass ...