Hey Mr Ed.
I had the T1 before I got the T2 and used the USB connection to transfer files to the hard drive.
The usb works differently on the Tyros to the 3000. It works with a "host" rather than with a "device".
Whebn I first set it up it worked okay but it was a real yawn as the files are transferred over a USB to Midi link which is really slow.
It is well worth updating the T1 O/S if it needs it and getting the latest Yamaha driver if you do not have these already and then using the fast bulk mode.
There are no instructions in the manual regarding how to do this as it was a later enhancement, but you simply hold down the music finder button while you turn on the Tyros.
You then get a different isplay on the tyros and all of the player functions are disabled but you can then see the T1 HD as a drive on your computer and can perform fast file transfers.
Best of luck.
KF