In the Android ecosystem, many budget or older devices have the physical hardware capability for USB On-The-Go (OTG) but lack the necessary software permissions to expose it to applications. The android.hardware.usb.host.xml
: Your device must be rooted to write files to the /system/ directory. androidhardwareusbhostxml file download 2021
In 2021, many users with older rooted devices (such as Samsung Galaxy S4 or older tablets) reported that even though their hardware physically supported OTG, the software lacked the necessary permission file to activate the USB Host API . Adding this file manually—typically to /system/etc/permissions/ —was a common community fix. Stack Overflow File Content In the Android ecosystem, many budget or older
In 2021, Project Treble became mainstream, allowing users to install Generic System Images on unsupported devices. Many GSIs lacked device-specific configuration files, including the USB host permission file. Project Treble became mainstream