Sending a file from arduino through USB.

Hello guys,
I am trying to figure out how can I send a file .txt from the SD card connected from arduino through USB to PC or other alternatives ways. Please I am just looking for hints because I find difficult to establish serial communication but not with the compiler!

This is currently being discussed in this thread: Arduino Forum

You need to get the serial communication to work properly first.
Once you have done this, it is not too hard to read the file from the
the file on the SD card and send it, one byte at a time.