The Moto G4 Plus does offer you a USB OTG functionality. You can easily connect your external drives to your device and view the files stored on them on your phone. In other words, the phone works as a host to your external drives. However, take care to check whether the file format on your drives is supported by the phone. In cases of file format incompatibility, you may need to format your drive to the supported format. Ensure you have taken a back up of your important files before formatting the drive.
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