I was able to successfully transfer media from an SxS card but not so with files on an external hard drive. I even tried to transfer files back to an SxS card to no avail. Kept telling me there were zero files.
Macbookpro OS X 10.6.3
2.33 GHz Intel Core 2 Duo
3G 667 MHz DDR2 SDRAM
FCP 7.0.2
XDCAM Transfer Version 2.5.1
XDCAM Clip Browser Version 2.00.01