USB extra taken space

[prathameshbarad007djspab]

In a usb of 64 gb it shows only 60gb.what's the extra memory is used for? What is inside in that?why can't we see it?

 

[raisonjohn]

In a usb of 64 gb it shows only 60gb.what's the extra memory is used for? What is inside in that?why can't we see it?

From: https://superuser.com/questions/1074712/usb-disk-64gb-only-shows-58-59gb
"Some of the flash storage device's listed capacity is used for formatting and other functions and thus is not available for data storage, therefore you will not see the full capacity.

When a flash storage device is manufactured, steps are taken to ensure that the device operates reliably and permits the host device (computer, digital camera, PDA, etc.) to access the memory cells; i.e., to store and retrieve data on the flash storage device. These steps, loosely called "formatting," utilize some of the memory cells within the device and thus reduce the capacity available for data storage by the end-user."

Other references:
https://uk.answers.yahoo.com/question/index?qid=20130626194712AAOgJeW
https://forum.xda-developers.com/galaxy-s3/help/solved-sandisk-microsd-64gb-59-47gb-t1700125
https://www.reddit.com/r/NoStupidQuestions/comments/8ehtfq/why_does_a_64gb_flash_drive_start_out_with_only/

 

[engineer5261]

Because 1 kb = 1024 bytes. See the size on disk field in bytes. It''s 64,xxx,xxx,xxx that equals 60 Gb. It's a marketing thing

 

[jsmithepa]

Short answer: IS NORMAL. Is like you look at the board @McDonals and u order the $2.99 Mcheese and when it's time to pay, is $3.50! what! outrageous! liars! Everybody does it.