I have bought a Seagate Backup Plus Fast 4TB:
http://www.seagate.com/external-hard-drives/portable-hard-drives/performance/backup-plus-fast-hdd/
It is a fantastic drive. What I was looking for was something portable that could be driven by a single USB port without additional power.
The drive came configured as a 4TB humongous MBR disk formatted with NTFS, with 4k sectors.
I had to undo this configuration to accommodate my needs (1.5TB HFS+ partition for Time machine backups and a 2.5TB NTFS partition working as a Mac/Windows shared drive. For this I have configured it as a GUID disk.
I am wondering: How do they configure this huge disk as MBR with a single 4TB partition? Can this be done with tools like Parted Magic? I did not have the time to test this but am still curious.
Thanks.