Outlining a book with index cards

This month, I'm working on book 5 of my ongoing epic fantasy series, Spectrum Legacy. I've been using this method to outline my books for a few years and I receieve a lot of questions about how I manage my outlining, so here's a quick overview of how my process works.
It's slightly different from a traditional 3-act structure, and slightly different from focusing on the middle of the book, but it has worked really well for me for the past dozen or so books I've written!
What's your favorite outlining method? Have you tried this one before?
𝗠𝘆 𝗯𝗼𝗼𝗸𝘀 𝗼𝗻 𝗔𝗺𝗮𝘇𝗼𝗻:
www.amazon.com/author/bethalv...
𝗙𝗶𝗻𝗱 𝗺𝗲 𝗲𝗹𝘀𝗲𝘄𝗵𝗲𝗿𝗲 𝗼𝗻𝗹𝗶𝗻𝗲:
Website: www.ithilear.com
Instagram: / authorbethalvarez
Facebook: / authorbethalvarez
𝗦𝗶𝗴𝗻 𝘂𝗽 𝗳𝗼𝗿 𝗺𝘆 𝗻𝗲𝘄𝘀𝗹𝗲𝘁𝘁𝗲𝗿 𝘁𝗼 𝗵𝗲𝗮𝗿 𝗺𝗼𝗿𝗲 𝗮𝗯𝗼𝘂𝘁 𝗺𝘆 𝘄𝗿𝗶𝘁𝗶𝗻𝗴 𝘃𝗲𝗻𝘁𝘂𝗿𝗲𝘀:
www.ithilear.com/newsletter.html
#authortube #writingabook #authorvlog #writers #writingcraft

[@gentlebreeze24]

This is amazing. Thanks a lot.

[@maryshade6122]

Thanks! Very helpful!