It's called a "flashdrive", "jumpdrive", or an external hard drive.
Yes but the usb device has to have space for data.
slowest device for data transfer
A direct data device is a device that can transfer data automatically from a document eg. a barcode reader reads a barcode
USB
The direct memory access or DMA mode of data transfer is the fastest amongst all the modes of data transfer.In this mode ,the device may transfer data directly to/from memory without any interference from the CPU.The device requests the CPU through a DMA controller to hold its data,address and control bus so that the device may transfer data directly to/from memory.
A wireless device, that lets you transfer, answer, or call for data from a device, like a Computer, or phone.
USB stick or memory card (with a USB card reader)
Transfer rate.
Data transfer schemes in Microprocessor :-Data can be transferred between memory, microprocessor and input output devices. the speed and format of all the input output devices does not matches microprocessor.For example some input output devices like ABC' and DAC's are slow as compared to microprocessor.Some devices are serial in nature while microprocessor is parellal in nature.Because of this, number of data transfer schemes have been devided to cope with this problem.The data transfer schemes can be broadly clasified into two categories :-
it is a device to transfer the data directly between io device and memory without through the cpu so it performs a high-speed data transfer between memory and io device
A data cable can be used to transfer information from a device to another device, such as a cell phone or computer.
access time