LG 42LM615T User Manual page 74

✎ It is recommended that you use USB memory sticks of 32 GB or less and
USB HDDs of 1 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 the 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.