Are you using the , or a heavily modded client with BepInEx / Sybaris ?

Before moving files around, you need to know exactly what a preset is and where the game stores it. File Format and Location

Copy this entire folder to your external drive or cloud storage to make them portable. Step-by-Step: Moving Presets to a New Setup

Before understanding "portable," we need to understand the anatomy of a COM3D2 preset file.

Install the Edit Scene Extension plugin via BepInEx. This tool adds an in-game search bar and categorization system for your presets, making it significantly easier to navigate large preset libraries on smaller, portable screens. Optimizing Presets for the Steam Deck and Handhelds