I plan to order 2013 on the USB HD with a download as well. Is the following the correct procedure?

1. DL 2013 over 10.5 on the OLD HD the software shipped on. That, I assume, preserves all existing song files.

2. For backup, Copy the above onto my PC HD which has TONS of room. That, I assume would get me a 13 on top of 10.5 version installed on my PC HD. Correct?

3. Copy the installation in #1 above onto the NEW USB HD in order to have 2013 installed on top of 10.5 but on a NEW HD to capture whatever technology improvements there might be vs. the HD that shipped in 2010.

(Do I need to first DELETE 2013 on the NEW HD and THEN copy the version created in #1 in order to actually get 13 installed "on top of" 10.5? For clarity...is it best NOT to install a "13 over 10.5 version onto the NEW HD that already has 13 installed?)

I plan to run BIAB off the USB HD.

Doest that all make sense?

THANKS!