I ran out of RAM trying to create the torrent (Even though I have 16GB)
So I'm 7Zipping the whole thing and will try again.
Going to take 24+ hours.
I do not understand why changing file compression method has any impact on RAM usage during torrent file creation. The overall size of the torrent contents might change, but it will still be the same order of magnitude.
The torrent's block size you selected may have had more do to with running out of RAM than the size of the torrent contents. What block size did you use? If the size of the torrent contents is around 200 GB, and you chose a block size of 8 MB, there would be around 25600 blocks. Which would be considered by some to be a reasonable amount. If you picked a block size of 256 KB, the number of blocks would be 819200 blocks, which most would consider an unreasonable amount. Or perhaps your torrent creation tool has an "auto" setting and you neglected to notice what it picked for you.
Maybe you are using a torrent creation tool that works better for torrents smaller than 200 GB?
Please feel free to disregard my comments if you have lots of experience with creating large torrents. Only pointing this out because it would be a shame for you to rebuild for 24 hours, only to find out you are still running out of RAM.