I plugged my My Book into my Samsung JS8500 (SUHD) and it isn’t showing up under Connections. I’ve seen older posts saying Samsungs can’t use higher than 1 or 2tb drives, but this info is in the manual:
“In QLED and SUHD TVs, after sorting files in the Folder view mode, the TV can display up to 1,000 files per folder. If the USB device contains more than 8,000 files and folders , however, some files and folders might not be accessible.”
No capacity numbers, but it sure sounds like the TV supports high capacity drives. Anyone had luck with a 4tb on a recent Samsung?