My external 3T disk runs fine on Windows 7.
When I connected (first time) to my Windows 8.1 desktop (EFI/EUFI BIOS) it detects the drive but gets parameter incorrect msg. In the System eventlog there were many entries with error Event ID 51. Windows didn't stop trying to access the disk.
PC has Asus Z97 Pro MB. The disk has just 1 big data partition. I have no clue.