They add cache in, but when i playback the video and have cache in it, it froze everything and said:" Hitfilm express is not responing". It that the case of you? help me please, i have to edit a video in a day and i dunno what to do. pleasssee
Please provide your system specs so we can look into this some more, as well as if the software crashes if you disable the caching.
What size media are you working with. It might take a bit subject to spec if your machine to complete a cache build.