Flash Drive- cannot read its exact size

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I purchased what was supposed to be a 256 GB flash drive but have never had it to read more than 4 GB. I was told that I needed to use exFat to make the flash drive see the full 256 GB.

I am using Win7 and Mac OS X. I did a disk management check in Win7 and it reads (3.91 GB Fat32 Healthy Partition) & 250.00 GB unallocated. How can I get the flash drive to read the full 256 GB if it really is that size or is the flash drive just toast? I am at a total loss here Help!!

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Best Answer by Kiawna Milton
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Answered By 0 points N/A #160292

Flash Drive- cannot read its exact size

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Under the Computer Management, right-click on which drive you wish to use and then click the Extend Volume option. It should be unallocated space.

Click the Next button and the partitions will be combined and will become your default drive.

Answered By 10 points N/A #160293

Flash Drive- cannot read its exact size

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I've had this issue before. I'm not sure what causes it, but I do have a fix. Here is what you do; be cautious, this will structure your memory stick or whatever generate you get into in phase 3, so continue at your own caution:

  1. Run command prompt as admin.
  2. Diskpart.
  3. Select disk 1 (or whatever number that corresponds to your flash drive, unless you have other external drives or more than one hard-drive in your computer, this is almost always disk 1; to view all your disks use list disk).
  4. Clean.
  5. Create partition primary.
  6. Select partition 1.
  7. Active.
  8. Format fs=fat32.
  9. Assign.
  10. Exit.
 
This is what usually performs for me, but as I described before, be cautious, I take no liability for missing information.

 

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