If an app stores file on sdcard, can a user access them?

I just need a confirmation. If my app saves data to the phone's sdcard (/sdcard/com.example.myapp/file.mp3), can a user browse to such folder on the card and mess with the files (开发者_C百科delete, rename, etc.)? I cannot find such info on the developer's site.

Thanks

Yes he can, there is no problem whatsoever. He will be able to see the files and modify them via the built in file manager, via code or from the PC when the device is connected.

Yes he can modify the files on the sdcard. You can verify it by e.g installing Astro and browse the sdcard, and modify files on your phone.

The SD card is capable of storing files with crypto protection called CPRM. Most devices that use SD cards don't bother to support it. Mere mortals such as ourselves cannot obtain keys to use the CPRM features on the card.