Ubuntu :: External HD Very Slow / Make It Up?

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I worry about mounting properly an external USB hard disk.
It is a sata 1To NTFS formatted
It works perfectly with a XP SP3.
With xuxbuntu 10.10 , with ntfs-3g installed , it is VERY long to transfer data:it took almost 3 days for 360Go.
When I connect to the station , it automatically mount by itself on /media/disk without any option;I suspect bad options are used and no use of NTFS-3G.
How to oblige it to mount with good options?