what is a usb device?

Answer 1

vibha a usb is universal serial bus. through this you can connect other hardware to your computer. these days mouse, keyboard, pen drive, hard drive, camera & phones are connected to the computers through usb ports. ports are those holes on the back of the computors where these devices can be fitted.

Answer 2

A device with Universal Serial Bus charateristics (it plugs into the USB port on your computer) There are 2 speeds, the older USB 1 and the newer (but aging) USB 2. There are many types of USB device, the most common being storage related such as flash drives.

Answer 3

Devices that are used with thro' the USB Port is a USB Device.

Usually a USB device doesn't have an external power as USB passes electricity

Answer 4

The USB Flash Drive device is a device which stores data

Answer 5

A usb device is something that is plugged into your usb port in your computer.Usually located in the back or sometimes there are one or two usb ports in the front.

Answer 6

An usb decive is a portable device which can hold information as like that of a cd/dvd.

A device device which stores data ans this can be connected through the universal serial bus port which is present in our system.

we can store all datas, pictures and documents inside this and also we can open this anywhere.

Answer 7

Any device that connects to your computer via the USB ports. The port is usually indicated by the following symbol on your computer: http://files.turbosquid.com/Preview/Content_on_7_20_2005_22_07_16/SPV_USBSymbol001_Thumbnail1.jpgfee06a6a-b4e3-4bde-b22a-0a86b9579ffdLarge.jpg

Answer 8

a usb device is many things ,what you have is usb sockets in your pc the beauty of usb is that you can plug things in and out of it while the pc is running in the old days everything you added to your pc ,example scanner,printer,gamepad,you had to turn off your pc and reboot for it to work,,so lots of things connect in your usb mp3 player digital camera etc etc i hope you could understand what i was saying cheers daz.r

Answer 9

USB mass storage device class (USB MSC) is a set of computing communications protocols defined by the USB Implementers Forum that run on the Universal Serial Bus. The standard provides an interface to a variety of storage devices.
A USB flash drive like this one, will typically implement the USB mass storage device class.
A USB flash drive like this one, will typically implement the USB mass storage device class.

Some of the devices which are connected to computers via this standard are:

* external magnetic hard drives
* external optical drives, including CD and DVD reader and writer drives
* portable flash memory devices
* adapters bridging between standard flash memory cards and a USB connection
* digital cameras
* various digital audio players & portable media players
* Card Readers
* Portable Gaming systems (Nokia N-GAGE/Sony PSP)
* personal data assistants and handheld computers
* some newer mobile phones, such as the Sony Ericsson K800 and K510, Nokia N73, Nokia E61

Devices which support this standard are referred to as MSC (Mass Storage Class) devices. While MSC is the official acronym, UMS (Universal Mass Storage) has become common as an online jargon.

The USB mass storage specification does not require any particular file system to be used on conforming devices. Instead, it provides a simple interface to read and write sectors of data—much like the low-level interface used to access any hard drive—using the "SCSI transparent command set." Operating systems may treat the USB drive like a hard drive, and can format it with any file system they like.

Because of its ubiquity and relative simplicity, the most common file system on embedded devices such as USB flash drives, cameras, or digital audio players is Microsoft's FAT or FAT32 file system with (optional) support for long names. Large USB-based hard disks may come formatted with NTFS, which is much less supported outside Microsoft Windows. However, a keydrive or any other device may be formatted using another filesystem (for example HFS Plus on an Apple Macintosh, or Ext2 under Linux, or Unix File System under Solaris or BSD). Of course, this choice may limit other operating systems' ability to access the contents of the device.

In cameras, MP3 players, and similar gadgets which must access the file system independently from an external host, the FAT filesystem is typically preferred by device manufacturers. Altering the file system on such a device is usually a bad idea: the device will probably stop working.
Complications of the mass-storage device class

The mass storage interface is an attractive option for many devices, such as cameras and media players, which are nonetheless capable of more functionality than being simple data repositories. By presenting themselves as simple datastores, these devices can leverage the high degree of support for the USB mass-storage device class in current operating systems' USB driver stacks and allow easy read and write access to their internal memories. The downside of doing so is that it prevents the device from easily presenting its actual functional behavior across the USB interface too. For example, the makers of a digital still camera would also like it to implement the USB still-image device class, allowing it to be controlled by image capture software.

Some USB digital cameras feature a switch allowing them to appear either as a mass-storage device or as a still-picture device (PictBridge or PTP), but they cannot be both at the same time because file system layers in operating systems usually assume that they are the only user. However, the PTP implementation in the device would change the underlying filesystem without being able to notify the host's operating system about the changed sectors.

Answer 10

ANY item that plugs into a USB port. This could be a mouse, a flash thumb drive...