data transfer using libusb

[mallesh453]

hello,this is mallesh
i want to use libusb in linux.

I have captured the USB vendor id,product id and serial numbers from LIBUSB API's..

upto this ok.

i'm trying to use the synchronous and asynchronous device io for data transfer.

before this i want to know few points.

libusb_bulk_transfer().
1)what this api will do?
2)what the data transfer in libusb means?
3)will it send/recieve data (maybe file) to/from the usb mass storage device(eg: pendrive)?
4)where the data present?
5)what we can do with libusb?

i think, this communication(dat sending/recieving) is between host and endpoint in the device.
what is the use of this communication?

please help me.
thanks.

[Rubberman]

Please explain exactly what it is that you are trying to do, and if this is for use in a kernel module, or user space program.