How to find out which Nintendo 3DS folder is in use?

Discussion in '3DS - Console, Accessories and Hardware' started by mashers, Feb 20, 2016.

  1. mashers
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    mashers Stubborn ape

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    I've got 3 folders in Nintendo 3DS on my SD card which correspond to NANDs (the folders with lots of letters and numbers). I only need the one which corresponds to my emunand, since I use arm9loaderhax to boot directly to ReiNand and bypass sysnand entirely. Is there any way to find out which of the Nintendo 3DS folders corresponds to my emunand so I can delete the others?
     
  2. JustAKirby

    JustAKirby GBAtemp Fan

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    Wouldn't you like to know?
    the emuNAND folder is usually the largest in size in my experience.
     
  3. TheKawaiiDesu

    TheKawaiiDesu Ball of Kawaiiness

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    The only way is to compare the folder size afaik. The big one is usually the emuNAND one if you install a lot of CIAs :)
     
  4. mashers
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    mashers Stubborn ape

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    Great idea guys! I didn't think of using the folder size. I don't have a huge number of CIAs installed as my games are on cart, but I could log the folder sizes, then install a CIA and check which folder has increased in size. Thanks dudes!

    — Posts automatically merged - Please don't double post! —

    Thanks again guys! One of the folders was significantly larger than the other two, so I moved the smaller ones off the SD card and everything is still there in my emunand. It was less than 30MB in total actually removed from the card, but I feel better knowing the only folder on there is the one actually being used ;)
     
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  5. andrexd

    andrexd Advanced Member

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    Sorry for bringing up this topic, but is there a way now to know? i have 3 folders and one of them isnt in use and i dont know who.
     
  6. mashers
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    mashers Stubborn ape

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    You could try what was suggested above:
    1. Put your sd card in your computer and log the precise size of each of the folders
    2. Put your sd card back in the 3DSafe and install a CIA on the NAND you want to keep
    3. Put your sd card back in your computer. The folder which has changed size is the one which corresponds to the NAND on which you installed the CIA
     
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  7. el_gonz87

    el_gonz87 GBAtemp Advanced Maniac

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    Also decrypt9 has maintenance -> sys info option, this will show you which is your SysNAND folder, so from there it is process of elimination between 2.

    Now that A9LH has made emunand obsolete, maybe they don't want to look into adding the same info for Emunand tho...
     
  8. deishido

    deishido Texture Modder

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    Here's a significantly faster way to tell which folder is in use, and even which folder is emunand and which is sysnand if you use both. It can also determine which emunand is which if you have multiples for any reason. This assumes you arent using a9lh to autoboot emunand.

    1. In each of the folders there is a folder called extdata, on a computer, rename all of these extdata folders (I used extdata_bak)

    2. Put the card in your system and turn it on. It will recreate home menu data and any theme you had will be gone. If you use homemenuhax, that will be temporarily disabled and you will be in sysnand.

    3. Turn off your system and check your card. One of the folders will now have a new extdata folder in addition to the old one you renamed in step 1. This folder is your sysnand, keep a note of which one it is

    4. To find your emunand, delete the new extdata in the sysnand folder and then rename the old extdata folder back to extdata. This will reinstall homemenuhax if you were using it, and you can get into emunand again. boot your system and get into emunand this time.

    5. As before, there will be no theme and the system will make a new extdata folder. Shut down and find which of the remaining folders has the new extdata. That is your emunand folder.

    6. Again, delete the new extdata folder and rename the old one back to extdata. This will restore everything to the way it was before. If this is the only emunand you use, you can now delete the other folders. If you use a9lh to autoboot emunand, you can also safely delete the sysnand folder if you want.

    7. If you have multiple emunands, repeat steps 4 and 5 to determine which folders are which emunands.

    You can delete what you don't want to keep. If for some reason you don't have a method to boot into some of the nands, that folder will never change and can probably be deleted.
     
  9. andrexd

    andrexd Advanced Member

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    Thanks to all, i figured it out :D
     
    Last edited by andrexd, Oct 28, 2016