Mesh deform Large file size Recently, I used mesh deform modifier with armature to animate a character, but after clicking on the "bind" button, I saw that not all the mesh was deformed by the cage, so I clicked "unbind."
I've repeated this action about 7 times and finally I got the results that I want. BUT the problem is after saving my project, my blend file became very very large: about 800Mb.

Why does it happen? How to reduce my blend file size?
Unbinding the Modifier should reduce your file size to the previous 60Mb,
but the deformation data from your binding will be deleted.
Same with the Surface Deform Modifier.
I recommend to keep the modifier unbinded and bind it only before final render (if your workflow allows that).