Textures not showing when sending .blend file to a freind

I am trying to get a freind to render parts of a project for me because they have a powerful pc. However when they get the .blend file they have a textureless version:

Can anyone advise why this is? I did import some .OBJ models into the scene, but of course it’d import the textures into the project too wouldnt it?

Use the file>external data>pack into file to get the textures to stay with the blend file. Even if not, you can send them the textures as well and as long as you use relative paths you should be okay.