Preview Thumbnails on Plex

I'm thinking about enabling preview thumbnails. Thing is on my plex I have about 20TBs of video on my mounted Google Drive.
Would this just kill my server's resources and download like crazy from my Google Drive?

Preview Thumbnails require a full download of each thing analyzed.

You can always turn it on, but plan to download 20TB as it creates them.

yikes ok no im not doing that ever