As Android versions advance, heightened security measures are pivotal, impacting access to Universal Serial Bus (USB) external devices. Security enforcement, especially on Android TV, Android Auto and Android Things (IoT) platforms, imposes restrictions on USB file system access, particularly for devices not predefined in Android's OEM list or custom USB devices.

The Storage Access Framework (SAF) is instrumental in enhancing security by channeling file operations through content URIs instead of direct file paths. However, this introduces challenges for applications that necessitate low-level file operations and restrict direct file modifications in external storage directories.

To address these constraints, our latest whitepaper proposes that the USB Custom Framework emerges as a solution. This framework offers diverse Application Programming Interfaces (APIs) for file access, read, write, etc., enabling Android apps to interact with USB devices seamlessly, regardless of OEM or custom specifications, bridging the gap created by Android's evolving security measures across various platforms.