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I have a 1.5TB Seagate Backup Plus USB 3.0 drive that somehow is only reporting 4GB in pretty much every system util I can find (Windows Disk Management, TestDisk, GParted, etc.) The 4GB size is uninitialized, and I'm afraid to either create a partition or do anything to the drive for fear of deleting the contents on the 1.5TB part of the drive.

The 4GB seems suspect. In other words, I'm thinking there's some sort of 4GB flash on this to provide functionality (like bitlocker) that should otherwise be hidden from the low level utils.

Any way to resurrect that other part of the drive, or otherwise recover that data?

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The Seagate Backup Plus devices do not have any sort of flash storage. Unless you can tell us what you did to the drive, we can't tell you, how to reverse what you did. –  Ramhound Sep 4 '13 at 12:40
We just plugged it in yesterday to the USB 2.0 slot of a Windows 7 PC...nothing special. Tried it on the USB 3.0 slot, same result. –  MrHoberto Sep 5 '13 at 1:52
If this is an old drive and/or you don't care about the warranty - Crack the case open, take out the HDD inside, and connect it directly to your PC via SATA cable, and check on the Motherboard BIOS to see what it see. If it sees the full drive, see if you can see the content of the HDD via the OS. –  Darius Sep 5 '13 at 15:17
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1 Answer

Use some sort of recovery program to check if you view the contents of the drive. I usually recommend DiskGenius as it has helped me quite a few times in the past in situations similar to yours.

If DiskGenius reports the drive size as 1.5TB you should be able to view the contents of the drive and you should also be able to copy them across to another drive.

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Just tried this, and it's reporting at 4GB size of the drive. I'm thinking something catastrophic happened to the drive (surge, physical, or otherwise). –  MrHoberto Sep 5 '13 at 1:53
@MrHoberto Some command was issued to create a single 4GB partition on the disk though –  Ramhound Sep 5 '13 at 2:48
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