If you have access to a newer version of 3ds Max (perhaps a trial version or a friend's machine), this is the only way to keep your scene data intact. Open the file in the of 3ds Max. Go to File > Save As .
If you can get temporary access to the newer version of 3ds Max—either via a colleague, a trial version, or a cloud workstation—the software itself has a built-in feature to save files down to older versions. Convert 3ds Max File To Older Version Online
If you do have access to the newer version of 3ds Max (or can access it via a cloud workstation), the software includes a built-in backward compatibility feature. Autodesk allows 3ds Max to save files up to . For example: If you have access to a newer version
When you don’t have the latest version installed, or you’re working on a machine without 3ds Max entirely, an or a cloud-based workaround is your best friend. Why 3ds Max Files Aren't Naturally Backward Compatible If you can get temporary access to the