[Shaun Sinnott] “2nd format: Apple Pro Res 422 (LT)
result: file size better only 4G ( I would prefer something similar to original file size. Must render to play on FCP Timeline.”
Your file size is not the most important choice, output quality is. Your 2nd (above choice) is the best compromise, FCP6 and up will match your time-line settings to the imported codec automatically, so
no rendering required.
Cheers
Alexander