1. Imported Models are saved to this folder:

• Documents\Lumion (VERSION)\Library: Up to 4 files per model (.LIB, .LIB.MTT, .LIB.INN, .LIB.TXX).
• The Documents\Lumion (VERSION) folder is on the C: drive by default:

2. Projects/Scenes are saved manually to .LS file via:

2.1: Lumion 10.x and newer

Files button -> Home - Welcome to Lumion screen -> Save button or use SaveAs button: 

2.2: Version 8.x and 9.x: 

Files button -> Save Scene tab -> Save As... button: 

2.3: Lumion 7.x and older

Save a copy of the Scene to an .LS file. 

Files button -> Save Scene and Models tab: 

3. As with any other important data on your harddrive, we recommend regular backups of the Documents/Lumion (VERSION) folder.

4. The only way to get Lumion to save Imported Model files in a different location is to re-direct the Documents folder to a different location. Instructions for this procedure are available on the Microsoft website:

External Link: Configuration of the Documents folder

See also:

Knowledge Base: Does Lumion save back-ups of Projects and Imported Model files?