How to use a 3 TB hard drive on a MacBookPro7.1 I have bought this hard drive: Seagate ST3000DM which is a 3TB 3.5" hard drive. When I connect it via a USB2 docking station, here is what OS X sees:

Disk Description :  ST3000DM 001-9YN166 Media   Total Capacity :    801.57 GB (801 569 726 464 Bytes)
Connection Bus :    USB Write Status :  Read/Write
Connection Type :   External    S.M.A.R.T. Status : Not Supported
USB Serial Number : (removed)   Partition Map Scheme :  Unformatted


Is there a software solution to this problem ? I have seen solutions that imply to buy a USB3 docking station but MacBookPro 7.1 only have USB2 ports.

Is there an hardware solution that don't imply buying a NAS, which is about two or three times the price of the disk itself ?
I'm concerned that the Partition Map Scheme shows up as "Unformatted".

I suggest you run Disk Utility and format the drive with Mac OSX Extended (Journaled) format to see what happens to the Total Capacity and to set the PM Scheme (which should be GUID).