The official forums purge old files. Use these archiving strategies:

If you’ve downgraded your Steam copy to the "0.17 - Aggressive Rework" beta branch, here are the mods you absolutely need.

Avoid activating too many mods at once, as they may conflict. Check File Structure:

How To Improve BeamNG Graphics with Mods! (Ultra Realism Tutorial)

Note: The official 0.17 update from 2019 featured significant upgrades to the physics engine, including improved tire behavior and updated vehicle rendering, making mods from that era highly focused on performance enhancements. www.beamng.com [Tutorial] Guide to Installing and Packaging Mods | BeamNG