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  • 64GB flash drive shows only 32GB

    Home Forums AskWoody support PC hardware Questions: How to troubleshoot hardware problems 64GB flash drive shows only 32GB

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      • #2370548
        cmptrgy
        AskWoody Plus

        I purchased a 64GB ScanDisk Ultra USB 3.0 flash drive about 5 years ago that shows only 32GB.
        I haven’t had to us it yet but I’d like to know how to get to recognize the full 64GB.

        How do I do that?

        HP EliteBook 8540w laptop Windows 10 Pro (x64)

      • #2370555
        Ascaris
        AskWoody MVP

        Where did you get it?

        It’s possible that it is a fake 64GB, and it really is 32GB.
        Otherwise, it is probably only partitioned to 32GB, with the rest unallocated or an unknown partition type.

        If you enter diskmgmt.msc into the search box in the start menu, and select that, it will bring up the Disk Management dialog. If it is 64GB, you should see the unallocated or unrecognized area to the right for that drive.

        Group "L" (KDE Neon Linux 5.22.0 User Edition)

        1 user thanked author for this post.
      • #2370582
        Rick Corbett
        AskWoody_MVP

        The first thing to check is how your 64GB USB flash drive is formatted.

        If it’s formatted as FAT or FAT32 then that’s probably the problem – neither format can create a partition larger than 32GB using Windows’ native tools. In this case Disk Management should show an ‘unallocated space’ for the remaining ‘missing’ 32GB.

        Fortunately there are 3rd-party utilities that will format past the ‘nomimal’ 32GB limitation of FAT/FAT32.

        If, however, it is formatted as NTFS (or exFAT) then, as @Ascaris has pointed out, time to check your flash drive for its REAL, not REPORTED, capacity. Have a look at this raymond.cc article: 5 Tools to Test and Detect Fake or Counterfeit USB Flash Drives.

        Hope this helps…

        Hope this helps…

        1 user thanked author for this post.
      • #2370584
        cmptrgy
        AskWoody Plus

        Where did you get it?

        It’s possible that it is a fake 64GB, and it really is 32GB.
        Otherwise, it is probably only partitioned to 32GB, with the rest unallocated or an unknown partition type.

        If you enter diskmgmt.msc into the search box in the start menu, and select that, it will bring up the Disk Management dialog. If it is 64GB, you should see the unallocated or unrecognized area to the right for that drive.

        You are correct, the remainder is unallocated.

        I went to Computer Management > Run as administrator > Computer Management > Storage > Disk Management. Right clicked the D partition, Extend Volume is greyed out.

        According to this article
        https://docs.microsoft.com/en-us/windows-server/storage/disk-management/extend-a-basic-volume
        If Extend Volume is grayed out, check the following:
        “The volume is formatted with the NTFS or ReFS file system. Other file systems can’t be extended,”

        Also I bought it at Amazon back then along with some 16GB flash drives.
        I do remember the cost of the 64GB was lower than expected.

        With those factors, I’ll just use this one as is. Thanks Ascaris.

        HP EliteBook 8540w laptop Windows 10 Pro (x64)

      • #2370588
        cmptrgy
        AskWoody Plus

        The first thing to check is how your 64GB USB flash drive is formatted.

        If it’s formatted as FAT or FAT32 then that’s probably the problem – neither format can create a partition larger than 32GB using Windows’ native tools. In this case Disk Management should show an ‘unallocated space’ for the remaining ‘missing’ 32GB.

        Fortunately there are 3rd-party utilities that will format past the ‘nomimal’ 32GB limitation of FAT/FAT32.

        If, however, it is formatted as NTFS (or exFAT) then, as @Ascaris has pointed out, time to check your flash drive for its REAL, not REPORTED, capacity. Have a look at this raymond.cc article: 5 Tools to Test and Detect Fake or Counterfeit USB Flash Drives.

        Hope this helps…

        Hope this helps…

        Hi Rick, I didn’t see your post in time.

        I solved the problem
        Went to https://www.partitionwizard.com/resizepartition/64gb-flash-drive-only-showing-32gb.html
        Method 2. Restore the 64GB Flash Drive to Its Original Capacity and used diskpart.

        Now that it is formatted as NTFS, are there differences on how to use it vs. FAT32?

        Usually I use flash drives to save data for those who I help.

        HP EliteBook 8540w laptop Windows 10 Pro (x64)

      • #2370609
        Paul T
        AskWoody MVP

        FAT32 is generally used for flash drives because it is supported by more than just Windows.

        cheers, Paul

        p.s. Windows will format all 64GB as FAT32. You don’t need 3rd party tools.

        2 users thanked author for this post.
      • #2370631
        Rick Corbett
        AskWoody_MVP

        Now that it is formatted as NTFS, are there differences on how to use it vs. FAT32?

        FAT32 remains a popular choice for bootable media but Microsoft deliberately limited formatting of ‘large’ removable media in favour of NTFS for the resilience of its file structure.

        For saving data from other Windows users I think NTFS will be more useful, especially if they have large media files (2GB or more each) like movies.

        Hope this helps…

        2 users thanked author for this post.
        • #2370637
          doriel
          AskWoody Lounger

          Linux already supports NTFS. I remember that in the past, in order to treansfer data between Windows and Linux, I formatted my external to FAT32. And as you say, large files could not be there “in one piece”. Since it was my backup solution, it was very frustrating to split ISO and MKV files into multiple files under 4 GB. I did that with 7-zip. Later, when my GNU/Linux supported NTFS, I instantly reformatted my external drive.
          Does iOS support NFTS? Seems like it does not. Or am I mistaken?

          Dell Latitude E6530, Intel Core i5 @ 2.6 GHz, 4GB RAM, W10 20H2 Enterprise

          HAL3000, AMD Athlon 200GE @ 3,4 GHz, 8GB RAM, Fedora 29

      • #2370656
        BrianF
        AskWoody Plus

        I know this discussion is about a flash drive but I think a relevant comment is that some devices, like a Garmin zumoXT GPS, require the an added SD card be formatted FAT32.  This wasn’t well documented so I made the mistake of purchasing a 64GB card that was exFAT formatted.  Reformatting it to FAT32 with Win10 resulted in 32GB of space.  As previously mentioned, a 3rd party utility was needed to get the full 64GB.  I used AOMEI Partition Assistant.

        • #2370843
          Drcard:))
          AskWoody Lounger

          Hi guys,

          Refer to the post Flash Drives 101 in the hardware section of this forum.

          You can format the drive to FAT32 and use all 64GB without 3rd party software.  It can be done in the Command Prompt or in Powershell.

          The main reason to format a drive over 32 GB in FAT32 is for the device is will be used on.   Gamers put their PlayStation 3 games on large (250 – 500 GB) flash drives in FAT32 because the device can’t read other formats.  Microsoft replacement for FAT32 for large drives is exFAT (also called FAT64).  ExFAT is read and written to by both Windows and macOS.

          If the drive was formatted using Windows File Explorer or Disk management, it would have formatted only 32 GB of the drive.

          You can get the whole drive back by formatting with Windows in exFAT format that Windows, macOS, and Linux will use.

          HTH, Dana:))

      • #2370817
        Alex5723
        AskWoody Plus

        Linux already supports NTFS

        macOS also can read data from NTFS formatted drives.

        1 user thanked author for this post.
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