LG 55LM670T User Manual page 121

✎ It is recommended that you use USB memory sticks of 32 GB or less and USB
HDDs of 2 TB or less.
✎ If a USB HDD with power-saving function does not work properly, turn the
power off and on. For more information, refer to the user manual of the USB
HDD.
✎ Data in USB storage device can be damaged so be sure to back up important
files to other devices. Data maintenance is the user's responsibility and the
manufacturer is not responsible for data loss.