Hi
FWIW, the drive format that works (for me) is exfat.
If you format a portable hard drive as exFat it works with Android, Windows and Mac. Great for file transfer between these devices.
One of the BEST things about the Galaxy Note 3 is its USB 3 connector. I don't know why they changed it back to the micro USB???
The USB 3 connector allows DIRECT connection and POWER TO USB 3 portable hard drives. (This does require the OTG cable). I started with a 1tb Toshiba drive. This worked exceptionally well until the drive died. At this point I changed to a Seagate 2TB drive.
The drive was formatted as exFat and is fully functional and accessible as a 2TB drive directly from the Galaxy Note 3.
This means I can read and write up to 2TB of data directly to and from the drive that is POWERED by the Galaxy Note 3 battery!! I do not know how long this would last as I have never timed it, but the drive "powers down" after a period of inactivity. Accessing the drive causes it to spin back up and work as normal. This is "the best thing since sliced bread"
I do have a 250gb SSD that came out of my PC when I upgrade the PC to a 500gb SSD. This also works and probably draws less power than the normal (Seagate) hard drive.
I was very disappointed to find that the Galaxy Note Pro 12.2 with a much lager battery capacity, DOES NOT power the Seagate drive.
kind regards
Peter
I guess the Tab S isn't compatible with Seagate hard drives. I've got a 1TB that I can't get to work. I'm trying to connect with a powered OTC. I guess they want you to buy Samsung drives. I might as well just get a 256GB flash drive. RIDICULOUS!!!