Narrowed it down to the "Share" standard built-in plugin. Build a blank project in r276, add "Share" object, export to app bundle / apk. Inspect AndroidManifest.xml with Android Studio, write external storage perm now exists.
Do the same steps in past Stable r268 and this permission doesn't exist for the "Share" object type.
Unfortunately removing the "Share" object from my actual Game Project didn't remove the permission though, so not sure other further built-in plugins are now causing this yet. I use no 3rd party.
Uploading to Google Play Store reports that 2 new permissions are added:
android.permission.READ_EXTERNAL_STORAGE
android.permission.WRITE_EXTERNAL_STORAGE
These permissions didn't appear last stable version with no changes to my c3 project.
Exported a signed app bundle.
Pretty cool game :)
Member since 17 Feb, 2014