Updating usb 1 to usb 2
The USB Implementers Forum (USB-IF) has developed logos for each of the four data rates. You can determine whether your USB 2.0 device is a High-Speed device in the Windows Device Manager (Figure A), although it is not a straightforward exercise. If the device is attached to this hub it will appear in the Attached Devices section.You will probably have to try more than one USB Root Hub before you find the device you are looking for. In this example, I have attached a flash drive and it is displayed as a USB Mass Storage Device.USB 3.0 will be welcomed by those who like to back up data to an external hard drive or SSD drive or who have any USB device that transfers large amounts of data.During my days at Hughes Aircraft Company, I was always looking for ways to save money.In practice, the cable to the USB device counts as one of the six cables, reducing the maximum total length.If the USB 2.0 five-meter limit is not long enough for your needs, you can purchase one or more USB hubs or special cables.Here is a summary of the major changes: There are four distinct data rates - not to be confused with the four USB specifications.Each new major USB specification introduced a new data rate.
Bottom line: Don't expect actual Super Speed data rates approaching 400MB/sec anytime soon.
I have a USB flash drive that can read at 26MB/sec and write at 6.6MB/sec and is typical of flash drives available as of late 2009.
These data rates are within the actual High-Speed data rate.
There are two types of hubs: powered and unpowered.
Higher power draw devices may require a powered hub.