Wednesday, January 11, 2017

What is the difference between a USB 2.0 and a USB 3.0? Will USB 2.0 ports support USB 3.0 portable drives or pen drives?

What is the difference between a USB 2.0 and a USB 3.0? Will USB 2.0 ports support USB 3.0 portable drives or pen drives?

11 Answers
Shreyas Ravindra
Shreyas Ravindra, USB Engineer at Qualcomm
USB 2.0 devices can operate at a maximum of 480Mbps = High Speeds. USB 3.0 devices can operate at a maximum speed of 5Gbps = Super Speeds. Also USB 3.0 has more pins compared to USB 2.0 which has 4 pins, VBus, D+, D- and GND. There are a lot of other differences which you can see in USB.org - Welcome which specifies the details.

In simple layman terms, you can think of it this way that USB 3.0 devices are faster than USB 2.0 devices. In laptops generally they are the "blue" ports or some have a Susper Speed Written on them explicitly

Yes, USB 2.0 ports will support USB 3.0 Pen Drives. Only thing is they will operate at a maximum speed of 480Mbps and not more than that! :)

USB is always backward compatible until now. With Type C, you may have to buy a converter ! :( But that's how it is!


https://www.quora.com/What-is-the-difference-between-a-USB-2-0-and-a-USB-3-0-Will-USB-2-0-ports-support-USB-3-0-portable-drives-or-pen-drives

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