Tap the start/patch button (usually a play icon or floppy disk at the bottom). A progress bar will appear.
However, the existence of XDelta Patcher on Android is not without challenges. The primary hurdle is file permission management within the Android operating system. As Google tightens security with every new Android version (restricting access to external storage and scoped storage), patching apps often struggle to access files located on an SD card or in deep directory structures. Users often have to navigate confusing permission prompts or move files to specific "Android/data" folders to get the patcher to function correctly. This friction highlights the ongoing tension between user freedom and OS security on mobile platforms.