recognize a drive as removable media (e.g. compact flash, sd card or usb drive)

[Mike Joyce]

	I am trying to write a portable script that will find removable media, 
such as compact flash, sd card, usb, etc. drive and then upload files 
from the media. I want this to be portable so that I can write and 
maintain one program for both Linux and Windows. Each platform uses 
different functions so even if I could find two platform dependent 
functions that would be fine. Basically, I would like to avoid checking 
fixed disks if possible.
	If anyone know of a good way to do this please let me know. Thanks in 
advance for any help.
-Mike Joyce