do blender overwrite imported file and exported file ?

i export my file from unreal engine (for fixing my model), they seem looks diffrent. when i export it back to UE. they changed !

i use FBX btw.

Moved from “General Forums > Blender and CG Discussions” to “Support > Technical Support”

If you use the same file name to export as the one you imported with, then yes. Blender will overwrite it because that’s what you told it to do.