Problem in particles cache link

Support Particles and Physics Simulations
1
  1. We made a car animation in blender - dust animation using blender’s smoke and baked the simulation in our network folder.
  2. We can open the file from any computer, render it locally. Every thing is perfect.
  3. BUT, when we copy and paste the .blend file, path of the cached simulation goes missing.
  4. But when we make copy using “Save As” option it’s good.

Can some one tell me how to solve this issue? I want blender to remember proper path “Relative” or “non relative”. Anywhere.