You can get information about connected USB devices, and you can transfer data with the devices. Get the full version for more features.

Note: Sometimes the Android system omits some information about certain USB devices.

Lite Version Features
• Get information about USB devices
• Make transfers with USB devices

Extra Full Version Features
• Bookmark information about USB devices
• 5 theme choices: Auto, Dark, Light, Black Out, and Light Amber
• Detect if the device is supported as an input device by your system
• Export data transfers as a text file

Full Version Link
https://play.google.com/store/apps/details?id=com.grantojanen.usbhost

More Details
Offline: Yes
Lightweight: Yes, < 1MB
Multi-Window Support: Yes
Descriptor: USB device communicator and info viewer (OTG)