Yes, SDFS can be used for reading a file and send that info out. It can be done serially so if you know how to use USB then it shoulf also work with that.

In my opinion for data logging stay away from the VDIP stuff and use a SD card.
I spent more time trying to use the VDIP than I did learning to use SDFS.

So, in the SDFS docs look at SDFS_READ command.