--MCIM is the PlayStation 1 Memory Card Image Manager. --Due to annoying GOOGLE regulations, Android 11+ users need to move files to the "Android / data / com.dokutajigokusai.mcim / files" folder. --You can copy files with this app alone, but you should use a filer app. --You can also download the apk from https://admob-app-id-8674893626.web.app/ and install it manually. --The target API level was set to 30 (Android 11) because it seems that the target API level 30+ will be enforced sooner or later. This will apply Scoped Storage to Android 11+ users, so the files must be placed under the "Android / data / " folder. Therefore, I added a file copy function to the app, but since it is the minimum, I recommend using the filer app. --Since it is thought that distribution in App Bundle format will be forced sooner or later, the minimum API level has been set to 16 (Android 4.1). In other words, in the environment for building in App Bundle format, some libraries use API level 16, so I had to do so.