Windows 10: New 3TB Drive Only Shows 746GB

Discus and support New 3TB Drive Only Shows 746GB in Windows 10 Support to solve the problem; I bought the Seagate barracuda 3TB and it shows as 746GB on my another computer with Windows Vista SP2 32-bit in GPT mode. I have asked this problem at... Discussion in 'Windows 10 Support' started by Skylly, Jan 30, 2019.

  1. Skylly Win User

    New 3TB Drive Only Shows 746GB


    I bought the Seagate barracuda 3TB and it shows as 746GB on my another computer with Windows Vista SP2 32-bit in GPT mode. I have asked this problem at Seagate forum and the one guy who replied didn't know how to solve it. I am using the 3TB Seagate drive in my Rosewill RX-358-U3B enclosure, and I have read that a Hitachi 3TB had no compatibility issues in that particular enclosure. Does anyone know how to have my computer realize that the Seagate drive is 3TB?"

    :)
     
    Skylly, Jan 30, 2019
    #1
  2. Grownman Win User

    Win 7 showing 746gb for 3tb drive?

    I recently purchased a WD 3TB green internal hardrive for backups. Upon booting into windows, the drive only shows 746gb's.

    I've already gone into device manager and updated the Nforce Serial ATA and the bios shows 3000. (I assume that is for the 3tb's?)

    I am not trying to install windows on the drive, but just use it as another drive for backup needs.
    I have tried to go to disk management and format the drive but it will not allow me.

    Any suggestions would be greatly appreciated!

    _______________________________________
    EVGA 780i SLI
    Q9550
    Primary - WD 1TB Black
    Backup - WD 2TB Black
    Backup - External WD 2TB elements
    *Backup - WD 3TB Green
     
    Grownman, Jan 30, 2019
    #2
  3. johnboy Win User
    Win 7 showing 746gb for 3tb drive?

    Has anyone found a solution to this? I have exactly the same issue.

    I have installed a Western Digital 3TB HD. When I go into the BIOS the drive is listed as having 3TB of space, but according to Windows 7 disk management the drive space is 746.39 GB.

    The drive is unallocated but I have the GPT partition style selected. If I attempt to create new partition the maximum size is 746GB.

    I have also tried a couple of third-party partitioning tools and get the same result unfortunately.
     
    johnboy, Jan 30, 2019
    #3
  4. New 3TB Drive Only Shows 746GB

    3TB Drive showing as 746GB

    Hello all. I have been searching and trying various things and can get nothing to work. All last week and starting this week I have been testing various hard drives through a dock. Last week I tested multiple 2TB drives, a few 3TB drives and one 4TB drive.

    Windows would pick them all up just fine. Now, the last two Seagate 3TB drives that I have docked, are only showing as 746GB. I have installed the latest Intel RST drivers and double checked to see what the drives are formated as. (GPT)

    In SeaTools the drive is showing up and is actually showing as 3TB with 2.73 usable. The only other thing worth noting is that prior to me having this drive it was setup in RAID, in a Drobo.

    Ideas?
     
    satindemon4u, Jan 30, 2019
    #4
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New 3TB Drive Only Shows 746GB

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