I may seem an stupid question but, is it necessary to keep the LRT files? or changes made to the metadata saved in the keyframes is already embeded in them and the lapse sequence as you import them back from Lightroom into LRT, the reason I amking is because at the moment I have more HD's than Microsoft.
Thanks,
Rodrigo

You don't need to keep them, if you don't want to use them for rendering in different settings.
I like to use them, because when I want to rerender in different resolution, speed or with different Motion Blur settings, I can just do that quickly via "File / Render Video", instead of having to reexport from Lightroom.

My thoughts exactly, as it takes so long to export. Thanks Gunther. I may as well get shares in Western Digital. jajaja