Hello Haper1981,
Thank you for your post.
SolveigMM video editing products do not add additional size to files after the editing.
You can try to use Video Splitter to save the segment from the file, it also preserves the original video quality.
You can download it here:
https://www.solveigmm.com/en/products/video-splitter/Also, if your task is to slice video into equal parts, please see this guideline on how to do this with Video Splitter:
https://www.solveigmm.com/en/howto/how-to-slice-video-by-time-size-or-parts-with-video-splitter/