A:Answer The USB ports on the LG 43 Inch Class 4K HDR Smart LED TV (42.5'' Diag), Model # 43UM6910PUA are USB 2.0 ports However, USB 3.0 is backwards compatible, meaning it can work with older USB versions including USB 2.0 and USB 1.1. You can plug a USB 2.0 device into a USB 3.0 port and it will always work, but it will only run at the speed of the USB 2.0 technology. You can play movies from an external USB hard drive on this TV. The USB hard drive must be formatted with he FAT32 or NTFS file system provided by Windows OS and it should have a rated voltage of 5V or less, a rated current of 500 mA or less, and should be 2 TB or less and a USB HDD with a power supply. (If the power supplied is not sufficient, the USB storage device may not be detected properly.) ...^IFV