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I have a Samsung Note2 with 4.1.1 on it. I have what appears to be a virtual sd card called /storage/sdcard0. It uses phone memory. When I installed my new 32gb sdcard it was mounted as /storage/extSdCard.

The OS only seems to use sdcard0 for SD-like storage (like apps). I know this because SuperBox is reporting apps on my SDCard and they are really on sdcard0. The only way I can use my external card is if I tell some application to use it for storage.

Since sdcard0 is just eating up precious phone RAM is there a way I can safely convince JB to start using /storage/extSdCard instead?

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You are very funny: sdcard0 is just eating up precious phone RAM is a good joke!</irony> Sorry, but that is your sdcard (though the internal), but not RAM. See: Why did /sdcard/ turn into /sdcard/0/ with 4.2? –  Izzy Jan 2 '13 at 15:13
I do not have 4.2. It really is based on RAM. It cannot both be internal and an SD card. –  user25986 Jan 2 '13 at 17:10
sdcard0 is not using RAM, sdcard0, as @Izzy said is your internal storage that is available. /sdcard/ is just a symlink to /storage/sdcard0/. It IS considered "sdcard" because it is built in storage that acts just like sdcard, except it cannot be removed. You cannot use the internal storage for anything except what you would use a normal sdcard for. –  Ryan Conrad Jan 2 '13 at 18:50
I think you confused RAM with internal flash storage (memory). –  Flow Jan 6 '13 at 22:34
@PauloRoberto - I think this may be the lowest rep user to ever get a gold badge. –  Compro01 Dec 3 '13 at 19:08
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1 Answer

If you're rooted, a simple, though kinda brute force, solution is simply to swap the mount points around. Root External 2 Internal will do this automatically at boot for you. This app is strictly intended for the GS3, but reviews report success with the Note 2 also.

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