FujiFilm X-H2S Owner's Manual page 212

PROXY SETTING (ONLY WHEN REC ProRes)
Choose whether the camera simultaneously records a duplicate
"proxy" video with movies shot in ProRes format.
Option Option
ON (H264)
ON (ProRes Proxy) Record proxy videos in ProRes Proxy format.
OFF
O •
Deleting the original footage from the camera also deletes the proxy
video. The original and proxy videos cannot be deleted separately.
•
When deleting movies from camera memory cards using a computer,
be sure to delete both the originals and the proxies.
6
188
Record proxy videos in H.264 format.
Proxy recording disabled.
Description Description