Tel
XDCAM HD and XDCAM EX are somewhat different animals, different physical media and different folder data structure. Your words “but when I import the clips folder” are a bit worrying. Thats not how you do it with XDCAM HD. In the Sony XDCAM Transfer app your mounted XDCAM disc should be automatically recognized, you should not be importing clips folders and whatnot.
Andy