How to convert 3ds rom size size to GB? And is 8gb enough?

Discussion in '3DS - Flashcards & Custom Firmwares' started by TwilightWarrior, Dec 20, 2013.

  1. TwilightWarrior
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    TwilightWarrior GBATEMP'S Official Boss

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    Hi guys, my gateway is almost here but I need to buy a micro sd card for the 3ds roms. So the Zelda size is 8192, what would that be in gb? Also would an 8gb card be enough or do some games exceed that size? Do you think that 8gb would be able to support 2 roms once multi rom support comes in?
     


  2. how_do_i_do_that

    how_do_i_do_that Blue Wizard is about to die.

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    1024 Mbit = 128MB
    2048 Mbit = 256MB
    4096 Mbit = 512MB
    8192 Mbit = 1GB
    16384 Mbit = 2GB
    32768 Mbit = 4GB

    It is case senitive.

    1 Byte = 8 bits

    The majority of roms that are 4GB are EXACTLY that and the microSDHCs of that size are slightly smaller which makes you NEED to get the next sized microSDHC higher which is 8GB.

    If you have to be cheap about getting a 8GB microSDHC, your current option is to use the 3DS ROM tool to trim the file. This will let you use 4GB microSDHCs for a while longer.

    http://gbatemp.net/threads/3ds-rom-tool-rom_tool.349314/
     
  3. dezmen

    dezmen GBAtemp Regular

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    8192 blocks = 1024MB = 1GB

    you can google for eShop block calculator
     
  4. Essometer

    Essometer GBAtemp Regular

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    Divide it by 8 to get the size in megabyte.
     
  5. CalebW

    CalebW Fellow Temper

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    the roms are about 1.3 GB
     
  6. kyogre123

    kyogre123 Mexican Pride

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    What the heck? Speed? I bet you are thinking on Mbits per second (Mbps).
     
  7. CalebW

    CalebW Fellow Temper

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    I think a Mbit is 1/8 of a MB...
     
  8. dezmen

    dezmen GBAtemp Regular

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    oh well maybe, just never used "bits" to define size -_- Usually all use "byte" as in kilobyte, megabyte, gigabyte etc.
    Still can't figure why Nintendo uses their "block" value. Glad there are easy convertors on net :tpi:
     
  9. CalebW

    CalebW Fellow Temper

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    I think they use it because they think it's easier for non-technical people to compare files sizes without having to convert between KB, MB, and GB.
     
  10. dezmen

    dezmen GBAtemp Regular

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    But it's not logical :wtf: SD cards are in GB, while their data in BLOCKS lol
    Btw
    Maybe this will help someone :)
    https://sites.google.com/site/eshopblocks/
     
  11. profi200

    profi200 Banned

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    1 block is 0x200 bytes (512 bytes), so you can easily calculate this by yourself, but that have not much to do with Gbit <--> GB.
     
  12. CalebW

    CalebW Fellow Temper

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    But to answer your original question, an 8GB card should hold around 2-7 games depending on each rom's file size. I think the biggest 3ds rom is about 4GB...
     
  13. kyogre123

    kyogre123 Mexican Pride

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    Hah, implying that it's easier to understand an obscure block system than the conventional measurement unit of bytes. Nintendo is infamous for making the stupidest decisions on the market.

    But, yeah... about the OP:
    4GB will be enough to store any ROM up to day if you trim it.
    8GB will let you have a minimum of two ROMs stored at the same time if you trim them.
    and so on...
     
  14. mznova

    mznova GBAtemp Regular

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    Some of the latest roms are 32GB so I think you should get a 32GB card if you really want to be safe in the far future. It's not like you're losing anything because we're gonna get multi-rom support soon so it'll be more convenient to have a bigger card anyways.

    Edit: My bad, I thought it was in bytes
     
  15. kyogre123

    kyogre123 Mexican Pride

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  16. PityOnU

    PityOnU GBAtemp Advanced Fan

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    To be fair, the definition of a kilobyte actually changed recently (2007) thanks to HDD and SSD manufacturers using the term constantly and incorrectly. The definitions are as follows:

    1 Byte (B) = 8 bits (bit/b)

    1 Kilobyte (KB) = 1,000 Bytes
    1 Megabyte (MB) = 1,000,000 Bytes
    1 Gigabyte (GB) = 1,000,000,000 Bytes
    1 Terabyte (TB) = 1,000,000,000,000 Bytes

    1 Kibibyte (KiB) = 1,024 Bytes
    1 Mebibyte (MiB) = 1,024 KiB = 1,048,576 Bytes
    1 Gibibyte (GiB) = 1,024 MiB = 1,073,741,824 Bytes
    1 Tebibyte (TiB) = 1,024 GiB = 1,099,511,627,776 Bytes

    So, 1TB is now actually ~91% of a TiB (a true terabyte).
     
  17. kyogre123

    kyogre123 Mexican Pride

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    Where all that came from? Has any relevant OS implemented such system yet? Because if this is not the case, it doesn't matter.
     
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  18. PityOnU

    PityOnU GBAtemp Advanced Fan

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    I can't speak for Linux (haven't specifically looked), but on Windows files are measured in KiB, but still denoted as KB.

    All of your storage medium are measured in the new KB, though.

    Hooray for standardization.
     
  19. how_do_i_do_that

    how_do_i_do_that Blue Wizard is about to die.

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    Base 10 definition of a gigabyte was done my market managers trying to cut corners since they can sell less numbers of bits compared to the base 2 definition of a gigabyte.

    You lose roughly 32MB or more when comparing a base 10 gigabyte to a base 2 gigabyte.
     
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  20. Subtle Demise

    Subtle Demise h

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    How can a 3DS cartridge have more capacity than a single layer Blu-Ray?