Sarah,
Carbonites saves always go to the usb media, however you can download them to your computer via FTP as well. You need to type
ftp://xxx.xxx.xxx.xxx (insert IP address :)) instead of the default
http://, as that will connect you to the media manager as you have seen. FTP access is also dependant on the browser you are using and you may need an FTP client if you dont have one already.
I hope this helps.
Nigel
#XPression