Mesh missing from mesh filter after copy the whole folder to another com

Hi there,i am currently facing this problem that i copy my orignal game folder into another computer using CDR.

so when i open the unity,i found that my mesh filter is missing from my helicopter(gameobjects) and inside my helicopter should have different parts which also having all missing mesh filter.

i wish to reput in mesh filter but i couldnt found in in my projects,what happened??Anyone know why is this happening and how to solve it…Thx

Please ensure you copy the whole project file to another compute include both Assets folder and Library folder.