Our T Box storage is almost full & I want to export some recordings to a USB to make room for new recordings but I can't do it. The manual says highlight the tile, press OK, & you will get an option to export the recording, but I don't get this - the only options available are "Play from beginning; view synopsis; delete; rename". How do I get the "export to USB" option? My USB is formatted to FAT32, and it is empty (it has 16 gb of space). Also, the manual says use the USB port at the front, which I have done, but I see there is another port at the back (I have tried that to, without success); what is that for? Thanks for any help.