do imported file changed all data inside of it ?

like i import FBX from blender. but the data changed to UE asset. is that mean, all data rewritten completely ?

so when i export, original data went missing ?

When you export out of UE4 it gets converted to whatever format it’s exporting to, it’s not the original file it’s exporting.

thanks for reply.

RIP my save file though :’(

(i make mistake when deleting files, my save file gone :p)