A:Answer You can connect a USB storage device (USB HDD, USB stick) to the USB port on the LG 70 inch Class 4K Smart UHD TV w/AI ThinQ® (69.5'' Diag), Model # 70UM7370PUA to enjoy the content files stored on the USB storage device on this TV.The supported Video codecs are VC-1 Advanced Profile (except for WMVA), VC-1 Simple and Main Profile with asf, wmv extensions, Xvid (GMC is not supported), H.264/AVC, Motion Jpeg, MPEG-4 with an avi extension, H.264/AVC, MPEG-4, HEVC, AV1 with mp4, m4v and mov extensions, H.264/AVC, MPEG-4 with 3gp, 3g2 extensions, MPEG-2, MPEG-4, H.264/AVC, VP8, VP9, HEVC, AV1 with an mkv extension, H.264/AVC, MPEG-2, HEVC with ts, trp, tp, and mts extensions, MPEG-1, MPEG-2 with mpg, mpeg, and dat extensions, and MPEG-1, MPEG-2 with a vob extension. It is recommended that you use an external USB HDD with a rated voltage of 5V or less and a rated current of 500 mA or less and it should have a power supply. (If the power supplied is not sufficient, the USB storage device may not be detected properly.). The USB HDD should be 2 TB or less...^IFV