Why do textures are way heavier once packaged than they are in my disk ?

Hey ! My game is getting really big, taking 40MB, which is a lot for a mobile game. When checking out the log of the Editor after generating the APK, I noticed that the heaviest files were textures that each were taking 5.3Mb of space. I went checking on my Assets folder, and saw that the actual size for each of those images wasn’t even above 500Kb.

My question is this: what would be the reasons why my textures weight a lot more once they get packaged, and is there a way to prevent that ?

Texture assets on your hard drive are probably in a compressed format, like PNG or Jpeg. Once imported into Unity and published to mobile they’ll exist in the format you’ve chosen. That may or may not be compressed.