Kingston microSD Card 512 GB Class 10 (SD Adapter Included)

u3 is different to uhs 3 u3 is to do with write speeds

To know why it happens, you need to know the difference between the Decimal system and the Binary system. Hard drive manufacturers advertise their products in the decimal system. But our operating systems, such as Windows or older MacOS, are based on binary math, which means storage is counted using base 2, not base 10, which storage is advertised as. This means that for the computer system, a KB is 1024 bytes, while for a hard disk manufacturer, one KB is 1000 bytes.

Since your computers work on the binary system, there is an increment of 2 to the 10th power or 1,024 in each storage level. Therefore, in the computer system:

Kilobyte (KB) = 1,024 Bytes
MegaByte (MB) = 1,024 Kilobytes or 1,048,576 Bytes
Gigabyte (GB) = 1,024 Megabytes or 1,073,741,824 Bytes
Terabyte (TB) = 1,024 Gigabytes or 1,099,511,627,776 Bytes

If you are interested to know more, we wrote a dedicated article on why drives show less capacity than advertised.
Read more: thats how all storage works. Bits and Bytes © PlatinumDataRecovery.com

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It will be fine. However, it's a huge card for installing ROM's onto unless you're emulating newer consoles.