Unity forgets meshes when importing a project.

Hello,

I am working on a project for school on two PC’s. I need to frequently swap the project file from one PC to the other. The problem is, everytime I import the project I’ve just exported from the other PC, it forgets the meshes.
All the objects are still in the scene, but it’s got no mesh link on it.

Any help with this?
Thank you in advance.

If you’re using Unity 3.5 or later, enable .meta files (the documentation is outdated: now this feature is also enabled in free version).

When you copy your project, you only need to copy Assets/ and ProjectSettings/. Without .meta files, you will have to copy Library/ as well and even so some connections between assets can be lost. But with .meta files you don’t have this problem anymore.