How is 4TB MBR drive showing 4TB in Win7?

The user bought a 4TB external USB drive.  Disk manager shows it is MBR.  Windows explorer shows it as 4TB.  I thought this was impossible unless it was reformatted as a GPT drive--where it would only show a bit over 2TB.  

I hope someone can help me understand what is going on.  TIA
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sasllcAsked:
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Benjamin VoglarIT ProCommented:
It is imposible.

The 2-TB barrier is the result of this 32-bit limitation. Because the maximum number that can be represented by using 32-bits is 4,294,967,295, this translates to 2.199 TB of capacity by using 512-byte sectors (approximately 2.2 TB). Therefore, a capacity beyond 2.2 TB is not addressable by using the MBR partitioning scheme.

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JohnBusiness Consultant (Owner)Commented:
Did the user partition into 2 partitions?  This would allow the user to see a total of 4 GB although not as one partition for MBR.
Dan CraciunIT ConsultantCommented:
For Seagate disks, if you have installed the DiscWizard drivers, you could create a second partition below the 2.2TB mark and enjoy the full 3-4TB of a disk with a MBR.

HTH,
Dan
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