Then I wanted to try out Ubuntu 14.10 here, however it seems to be problems with the exFAT file system, the disk is mounted correctly. I have the drive formatted as NTFS the same, there eh no reason to use exFAT. Formatting also takes just 3 seconds, then the drive works on both Windows (8.1), in Ubuntu, and also under OS X 10.10.2 as you imagine it: very, very quickly, about 450MByte / s when reading ,
One point deduction for not available immediately after plugging in full capacity.