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Course 6: SuperSpeed USB 3.0
Chapter 2: The Need for USB 3.0
Much like the demand that fueled the transition from USB 1.0/1.1 to USB 2.0, the introduction of advanced new applications that rely on USB technology has created the need for further enhancements to the USB standard. Older USB specs are often simply too slow for these new, data-hungry applications
Using the previous example of external storage applications, given the drastic increase in hard drive capacity over the last decade, transferring the contents of an external hard drive requires more bandwidth than has ever been necessary; whereas a 1TB6 hard drive is now commonplace, such capacity was unheard of in 2000, around the time when the USB 2.0 standard was first released. As such, the size of the data transferred back and forth between an external storage device and a computer has increased.
Similarly, the types of media/data that are being transferred/utilized have evolved in proportion to the new technologies that have been developed. As data/media becomes "richer", the speed at which it can be transferred becomes a pivotal aspect of the convenience and quality it offers. High quality multimedia files, for example, can range from a few gigabytes in size to tens of gigabytes, depending on the compression used, or lack thereof. Transferring or streaming such a file using USB 2.0, while possible, can become cumbersome enough to make it impractical to transfer or stream in the first place.
Clearly, to accommodate the increase in data size that goes hand in hand with new forms of media, a new standard is required in order to more easily handle current file sizes. USB 3.0 does just that.61 TB = 1 Terabyte = 1,024 Gigabytes