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I have 128GB SuperSonic Rage 2

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and my pc shows only 117GB:

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I tried to format with BOOTICE from this answer and then from this answer. Still shows 117 GB.

Somewhere I read that USB calculate capacity 1GB = 1000MB and computer 1GB = 1024MB. If this is true, my capacity 117GB is wrong anyway because 128000MB / 1024 = 125GB

Please help me give me back full size. Thank you!

Dave
  • 117

2 Answers2

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First of all, it's not enough to say that 1GiB = 1024 Mib and 1GB = 1000MB. You have to consider that this relation holds for smaller unit of measure, i.e.

1GiB = 1024MiB = 1024*1024KiB = 1024*1024*1024B = 2^30B
1GB  = 1000MB  = 1000*1000KB  = 1000*1000*1000B = 10^9B

So, the ratio GiB/GB is not 1000/1024=0.976 but 10^9/2^30= 0.931. This drops down your storage significantly: 128GB = 119.2GiB. That leaves aside a couple of GiB. These overhead is reserved for file-system usage purpose. You can not get rid of this space, whether you are using FAT32, exFAT or NTFS. It could change the size of the overhead, but it will remain there by all means.

Simone L.
  • 61
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  1. It is customary for storage manufacturers to state the capacity in decimal bytes. Which means that 1 GB = 1,000,000,000 bytes and not 1.073.741.824. Note the 7.5 % savings, which means that if this were the only reason, your stick would be 118.4 GB.

  2. For flash devices they may include the backup sectors in that total, even if you cannot use them.

  3. They lie on the true capacity anyway, because it's easier to sell a 128 GB stick than a 117.85 GB (or 129.32 GB) one.

Seth
  • 9,393
xenoid
  • 10,597