LG Help Library: G4 – External USB peripheral not recognized

EXTERNAL USB HARD DISK DRIVE

UNRECOGNIZED BY G4

G4 won’t recognize USB OTG external HDD when connected to phone

Symptom Symptom

Any external Hard Disk Drive (HDD) peripherals or USB connection powered fan requiring high

power consumption will be identified as such and refused recognition as device they are by G4

phone when connected to the smartphone via USB OTG (on-the-go).

Note: If momentary power consumption by peripheral device when connected via

OTG is 600mA or greater the connection automatically gets lost.

How to fix

Standard USB rating is 500mA. Please note that in most cases peripheral devices are still being

supported if their power consumption is greater.

1. Previous LG models and competitors’ as well did not offer such restriction and thus allowed

phones to work with such devices.

However, it was quickly detected an area of concerns especially when battery consumption was

found to increase rapidly and dramatically (more than four times the normal drainage) and device

often suddenly powering off due to a drained battery.

2. In that case, device operation became unstable and product performance was also severely

affected. Now new LG models do not support USB peripheral connection requiring high power

consumption in order to secure stability of product use .

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