For the fictional propulsion system, see Jump drive. For the USB flash drive brand of the same name, see Lexar. This article has multiple issues. Please help improve it or discuss usb Flash Drive 8gb issues on the talk page.
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Please help this article by looking for better, more reliable sources. Unreliable citations may be challenged or deleted. A Sandisk Cruzer USB drive from 2011, with 4GB of storage capacity. A USB flash drive, also variously known as a, thumb drive, pen drive, jump drive, disk key, disk on key, flash-drive, memory stick or USB memory, is a data storage device that includes flash memory with an integrated USB interface.
USB flash drives are typically removable and rewritable, and physically much smaller than an optical disc. Since first appearing on the market in late 2000, as with virtually all computer memory devices, storage capacities have risen while prices have dropped. As of March 2016, flash drives with anywhere from 8 to 256 GB are frequently sold, and less frequently 512 GB and 1 TB units. Storage capacities as large as 2 TB are planned, with steady improvements in size and price per capacity expected.
They are smaller, faster, have thousands of times more capacity, and are more durable and reliable because they have no moving parts. Until about 2005, most desktop and laptop computers were supplied with floppy disk drives in addition to USB ports, but floppy disk drives have become obsolete after widespread adoption of USB ports and the larger USB drive capacity compared to the 1. Unix-like systems, as well as many BIOS boot ROMs.
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USB drives with USB 2.
A flash drive consists of a small printed circuit board carrying the circuit elements and a USB connector, insulated electrically and protected inside a plastic, metal, or rubberised case, which can be carried in a pocket or on a key chain, for example.
The USB connector may be protected by a removable cap or by retracting into the body of the drive, although it is not likely to be damaged if unprotected.
Most flash drives use a standard flash-A USB connection allowing 8gb with a port on a personal computer, but drives for other interfaces also exist. USB flash drives draw power from the computer via the USB connection. USB flash drives were invented at M-Systems, an Israeli company, in a US patent filed in April 5, 1999 by Drive Ban, Dov Moran and Oron Usb, all M-Systems employees at the time. The product was announced by the company in September 2000, and was first sold by IBM in 8MB capacity starting December 15, 2000.
Pua Khein-Seng from Malaysia is considered by many to be the «Father of Pen Drive». He is notable for incorporating the world’s first single chip USB flash controller.
Pua hails from Sekinchan, Selangor, Malaysia. Pua founded Phison Electronics based in Taiwan with four other partners and is believed to have produced the world’s first USB flash drive with system-on-chip technology.
Competing claims have been made by Singaporean company Trek Technology and Chinese company Netac Technology, Both Trek Technology and Netac Technology have attempted to enforce their patent claims. Trek won a Singaporean suit, but a court in the United Kingdom revoked one of Trek’s UK patents. While Netac Technology has brought lawsuits against PNY Technologies, Lenovo, aigo, Sony, and Taiwan’s Acer and Tai Guen Enterprise Co, most companies that manufacture USB flash drives do not license Trek and Netac’s patents.
Trek Technology and IBM began selling the first USB flash drives commercially in 2000. USB cable that eliminated the need for a USB hub.
By 2003, most USB flash drives had Usb Flash Drive 8gb 2. That is considerably slower than what a hard disk drive or solid-state drive can achieve when connected via the SATA interface. 20 times faster than the theoretical transfer rate achievable by USB 1.
0 dramatically improved data transfer rates compared to its predecessor. It was announced in late 2008, but consumer devices were not available until the beginning of 2010.
0 devices are backward compatible with USB 2. As of April 2016 most consumer desktop and laptop computers have one or more USB 3. 0 ports available on the back IO plane or through PCB headers. 0 expansion cards are also available to upgrade older systems.
As of March 2015, some manufacturers have announced USB 3. The first USB flash drive appeared on the market in late 2000, providing a storage capacity of 8 MB. 512 GB and 1 TB by January 2013. 2013 Consumer Electronics Show and became available later that year.
As of July 2016, flash drives with anywhere from 8 to 256 GB are frequently sold, and less frequently 512 GB and 1 TB units. At the 2017 International Consumer Electronics Show a 2 TB flash drive was announced.
USB plug, facilitating data transfers between different devices. Typically, one of these ICs provides an interface between the USB connector and the onboard memory, while the other is the flash memory.
Drives typically use the USB mass storage device class to communicate with the host. 2 cm in length, 1 cm in width, and 2 mm in thickness. Flash memory combines a number of older technologies, with lower cost, lower power consumption and small size made possible by advances in microprocessor technology. The memory storage was based on earlier EPROM and EEPROM technologies.
These had limited capacity, were slow for both reading and writing, required complex high-voltage drive circuitry, and could be re-written only after erasing the entire contents of the chip. Hardware designers later developed EEPROMs with the erasure region broken up into smaller «fields» that could be erased individually without affecting the others. Altering the contents of a particular memory location involved copying the entire field into an off-chip buffer memory, erasing the field, modifying the data as required in the buffer, and re-writing it into the same field.