Sandisk Ultra Fit 3.1(adverted and actual size GB)

<If there is similar subject thread already post, please provide link.>

Sandisk Ultra Fit 3.1 USB Stick (big difference adverted and actual size GB)

Subject: what is your actual real size GB?

Intro:

I have several (8) usb sticks collected over past the years (having different adverted sizes).

All the time the actual (real) size is according within the standard margin.

Example 1: 

I own a 64GB (adverted) Kingston usb stick, having real size 58.5 GB.

You might expect to get +/-:  64 000 000 000 bytes / (1024*1024*1024) = 59.60 GB

What I got actual size     +/-:  62 895 000 000 bytes / (1024*1024*1024) = +/- 58.50 GB

Example 2:

I own a 128GB (adverted) Lexar usb stick, having real size  119.2 GB.

You might expect to get +/-:  128 000 000 000 bytes / (1024*1024*1024) = 119.2 GB

What I got actual size     +/-:  128 000 000 000 bytes / (1024*1024*1024) = +/- 119.2 GB

Example 3: 

I own a 32GB (adverted) Sandisk usb stick, having real size 29.7 GB.

You might expect to get +/-:  32 000 000 000 bytes / (1024*1024*1024) = 29.8 GB

What I got actual size     +/-:  31 997 000 000 bytes / (1024*1024*1024) = +/- 29.7 GB

Sandisk Ultra Fit 3.1 256 GB Example:

Recently I bought from Amazon a Sandisk Ultra Fit 3.1 256GB.

You might expect to get +/-:  256 000 000 000 bytes / (1024*1024*1024) = 238.4 GB

What I got actual size     +/-:  246 00 000 000 bytes / (1024*1024*1024) = +/- 229.1 GB

As you see, my Ultra Fit 3.1 is like 9 GB less in actual size than it should be.

I did format in FAT/NTFS, but it still remain 229.1 GB in my Win 10 64 bit OS.

Also, I did not observe any hidden files.

Question 1:

Can anyone please provide screenshot and/or text of his/her Sandisk Ultra Fit 3.1 adverted size and real size?

Question 2:

If my Sandisk Ultra Fit 3.1 256 GB seems to have signficantly less than it should be, shall I return back to get money back (because of possible manufacturing error or something related)?

Thanks in advance.

Kind regards,

Info link (my calculations are based on these sources):

https://www.howtogeek.com/123268/windows-hard-drive-wrong-capacity/ 

http://www.endmemo.com/data/diskcapacity.php

IMG_4956.JPG

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IMG_4957.JPG

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Return it to where you bought it, don’t tell them you formated it, and buy something else.

http://forums.sandisk.com/t5/All-SanDisk-USB-Flash-Drives/32-GB-listed-storage-only-got-28-6-GB/m-p/366720#M13588