So many clients confused that what is the basic standards for  a specific USB capacity about the write,read speed,controller,chips brand and actual available capacity,today we state our basic standard for clients reference:

Memory size  &  Actual available capacity
 128MB            >120MB
 256MB            >245MB 
 1GB              >958MB
 2GB              >1.78GB
 4GB              >3.74GB
 8GB              >7.46GB
 16GB             >14.78GB
 32GB             >29.5GB
 64GB             >58GB
 128GB            >116GB
 Usual speed(USB 2.0 port)
 128MB to 16GB
 Writte speed:>3-4MB/s  Read speed:>10MB/s
 32GB to 64GB
  Writte speed:>6-8MB/s  Read speed:>20MB/s
  64GB to 128GB
  Writte speed:>9MB/s  Read speed:>25MB/s
 Higer speed with little price than commnon standard,if have special requirements about actual capacity and speed,please
 clarify to us before order confirmed.

Controller:Chipsbank,Alcor (frequently adopt),SIM,PHISON(the last two usually apply to USB3.0)

Chips:Samsung/Toshiba/Micron/Sandisk/Hynix (will adopt one the name brand based on stocking)

If you have special about the USB speed,controller,chips brand,please clarify before confirm order to us,otherwise our factory will produce based on market stock.

More query or interest,please write email to us info@dbhpromo.com