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Old April 20th, 2013, 08:39 PM   #1 (permalink)
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Default [GUIDE] Swap external sd card with internal

I figured this out a long time ago but forgot to update this post sorry, here is a easy guide.

1. Use a file explorer with access to system files such as ROOT EXPLORER
2. Navigate to /etc directory
3. Activate Mount R/O
4. Copy internal_sd.fstab and external_sd.fstab files to a different folder
5. Rename internal_sd.fstab to external_sd.fstab
6. Renaming, do the opposite external_sd.fstab to internal_sd.fstab
7. Copy both files to /etc directory and replace both files
8. Restart your phone
9. Enjoy
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Old April 29th, 2013, 07:54 AM   #2 (permalink)
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Post the content of your vold file and I'll see if I can help out.
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Old May 5th, 2013, 09:45 PM   #3 (permalink)
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Default Sorry for the really late reply

I will greatly appreciate it if you help me.
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Old May 5th, 2013, 10:39 PM   #4 (permalink)
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Im in the same boat it i fig it out ill let you know
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Old May 7th, 2013, 04:14 AM   #5 (permalink)
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You could try this app:

https://play.google.com/store/apps/details?id=eu.codlab.int2ext

I would test it myself but I don't have the down time to mess with my phone right now :-/

Please let me know if it works! :-)
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Old May 9th, 2013, 05:59 AM   #6 (permalink)
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There's nothing I can do unless you post the content of your vold file. It may be called /system/etc/vold.fstab
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Old May 9th, 2013, 10:28 AM   #7 (permalink)
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What is the advantage of swapping cards?
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Old May 9th, 2013, 08:33 PM   #8 (permalink)
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Quote:
Originally Posted by Spec2nirvash View Post
What is the advantage of swapping cards?
It causes your phone to use your sdcard as primary storage, and stores less files on internal storage

Rather than "swap" I setup my phone to relocate internal storage to the location /mnt/sdcard/internal_fs. So I decide what gets saved on internal storage and what isn't. Which means-
  1. More free space on internal storage, so I can install more apps.
  2. Also if my device can't boot (smashed screen, water damage, other), all my personal files stored safely on sdcard. Simply pull the sdcard out and put it in another device.
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Old May 9th, 2013, 08:53 PM   #9 (permalink)
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Never thought about it that way, 2nd reason you gave is enough for me to do it Thanks Sepero!
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Old May 9th, 2013, 10:14 PM   #10 (permalink)
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Default Voldfstab

# Vold 2.0 Generic fstab
## - San Mehat (san@android.com)
##

#######################
## Regular device mount
##
## Format: dev_mount <label> <mount_point> <part> <sysfs_path1...>
## label - Label for the volume
## mount_point - Where the volume will be mounted
## part - Partition # (1 based), or 'auto' for first usable partition.
## <sysfs_path> - List of sysfs paths to source devices
######################

## Example of a standard sdcard mount for the emulator / Dream
# Mounts the first usable partition of the specified device
#dev_mount external_sd /mnt/sdcard auto /devices/platform/goldfish_mmc.0 /devices/platform/msm_sdcc.2/mmc_host/mmc1
dev_mount flash /mnt/external_sd auto /devices/virtual/mtd/mtd9/mtdblock9
dev_mount sdcard /mnt/sdcard auto /devices/platform/rk29_sdmmc.0/mmc_host/mmc0
dev_mount udisk0 /mnt/usb_storage/USB_DISK0 1 /devices/platform/usb
dev_mount udisk1 /mnt/usb_storage/USB_DISK1 1 /devices/platform/usb
dev_mount udisk2 /mnt/usb_storage/USB_DISK2 1 /devices/platform/usb
dev_mount udisk3 /mnt/usb_storage/USB_DISK3 1 /devices/platform/usb
dev_mount udisk4 /mnt/usb_storage/USB_DISK4 1 /devices/platform/usb
dev_mount udisk5 /mnt/usb_storage/USB_DISK5 1 /devices/platform/usb
## Example of a dual card setup
# dev_mount left_sdcard /sdcard1 auto /devices/platform/goldfish_mmc.0 /devices/platform/msm_sdcc.2/mmc_host/mmc1
# dev_mount right_sdcard /sdcard2 auto /devices/platform/goldfish_mmc.1 /devices/platform/msm_sdcc.3/mmc_host/mmc1

## Example of specifying a specific partition for mounts
# dev_mount sdcard /sdcard 2 /devices/platform/goldfish_mmc.0 /devices/platform/msm_
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Old May 11th, 2013, 12:09 AM   #11 (permalink)
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This should swap your internal and external mount locations. First make a backup of your vold.fstab file, then change the following two lines
Code:
dev_mount flash /mnt/external_sd auto /devices/virtual/mtd/mtd9/mtdblock9
dev_mount sdcard /mnt/sdcard auto /devices/platform/rk29_sdmmc.0/mmc_host/mmc0
To this
Code:
dev_mount flash /mnt/sdcard auto /devices/virtual/mtd/mtd9/mtdblock9
dev_mount sdcard /mnt/external_sd auto /devices/platform/rk29_sdmmc.0/mmc_host/mmc0
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Old May 11th, 2013, 04:45 PM   #12 (permalink)
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Quote:
Originally Posted by Sepero View Post
This should swap your internal and external mount locations. First make a backup of your vold.fstab file, then change the following two lines
Code:
dev_mount flash /mnt/external_sd auto /devices/virtual/mtd/mtd9/mtdblock9
dev_mount sdcard /mnt/sdcard auto /devices/platform/rk29_sdmmc.0/mmc_host/mmc0
To this
Code:
dev_mount flash /mnt/sdcard auto /devices/virtual/mtd/mtd9/mtdblock9
dev_mount sdcard /mnt/external_sd auto /devices/platform/rk29_sdmmc.0/mmc_host/mmc0

I think the file he posted is actually /system/etc/external_sd.fstab
I changed the values you said to and it changed the mount points...but the OS still sees the actual SD card as an sdcard in settings> storage.

Here's the contents of the vold.fstab file:

Quote:
# Copyright (c) 2011, Code Aurora Forum. All rights reserved.
#
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# modification, are permitted provided that the following conditions are
# met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following
# disclaimer in the documentation and/or other materials provided
# with the distribution.
# * Neither the name of Code Aurora Forum, Inc. nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
# WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
# IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

dev_mount sdcard /mnt/sdcard auto /devices/platform/msm_sdcc.3/mmc_host
Also there is a file called internal_fs.fstab. Here's the contents of that:

Quote:
## Vold 2.0 Generic fstab
## - San Mehat (san@android.com)
##

#######################
## Regular device mount
##
## Format: dev_mount <label> <mount_point> <part> <sysfs_path1...>
## label - Label for the volume
## mount_point - Where the volume will be mounted
## part - Partition # (1 based), or 'auto' for first usable partition.
## <sysfs_path> - List of sysfs paths to source devices
######################

## Example of a standard sdcard mount for the emulator / Dream
# Mounts the first usable partition of the specified device
#DTS2012012001091 w00177577 2012/01/20 rm external primary
#DTS2011121600087 w00177577 2011/12/28 ics dual sdcard
dev_mount sdcard /mnt/sdcard fuse
dev_mount sdcard2 /mnt/sdcard2 auto /devices/platform/msm_sdcc.3/mmc_host
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Old May 12th, 2013, 03:21 AM   #13 (permalink)
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Well, if it's not working, then I can help get it done in a chat session. I'd need a volunteer though.

If anyone wants to volunteer, you can meet me on irc.freenode.net channel #sepero

I'll be in there for a week or so. Obviously I'm not at my computer 24/7, so if I don't answer, then just hang out and I'll eventually be around.
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Old May 12th, 2013, 04:08 AM   #14 (permalink)
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Quote:
Originally Posted by Sepero View Post
Well, if it's not working, then I can help get it done in a chat session. I'd need a volunteer though.

If anyone wants to volunteer, you can meet me on irc.freenode.net channel #sepero

I'll be in there for a week or so. Obviously I'm not at my computer 24/7, so if I don't answer, then just hang out and I'll eventually be around.
So do you understand that the file jokerpks posted wasn't the one you asked for?
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Old May 12th, 2013, 04:51 AM   #15 (permalink)
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I understand that the file jokerpks posted wasn't the one I asked for.
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Old June 1st, 2013, 10:51 PM   #16 (permalink)
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Post Huawei Premia 4G M931 [just added 32gig SDCard]

As someone who just added a 32gig Micro SDCard, this idea of "swapping" sounds good. But... how many out there have successfully done it on this phone? The "Root External 2 Internal SD" app seems hard to use [based on the description]. And, from what I've read here, other methods seem difficult at best?
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Old June 1st, 2013, 11:18 PM   #17 (permalink)
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I just updated the post with a guide.
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Old June 2nd, 2013, 06:07 PM   #18 (permalink)
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Quote:
Originally Posted by jokerpks View Post
1. Use a file explorer with access to system files such as ROOT EXPLORER
2. Navigate to /etc directory
3. Activate Mount R/O
4. Copy internal_sd.fstab and external_sd.fstab files to a different folder
5. Rename internal_sd.fstab to external_sd.fstab
6. Renaming, do the opposite external_sd.fstab to internal_sd.fstab
7. Copy both files to /etc directory and replace both files
8. Restart your phone
9. Enjoy
I think I know how to do all steps except number 3? What does this means? I'm a noob to Android. [I bricked my first Huawei Premia 4G after 2 weeks. My sad story is told in a rooting thread]
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Old June 2nd, 2013, 06:13 PM   #19 (permalink)
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Quote:
Originally Posted by TheEmpathicEar View Post
I think I know how to do all steps except number 3? What does this means? I'm a noob to Android. [I bricked my first Huawei Premia 4G after 2 weeks. My sad story is told in a rooting thread]
What step 3 does is make the folder writable, that way you can paste the new files in. In root explorer, it usually has a button at the top, with either rw or ro
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Old June 2nd, 2013, 06:28 PM   #20 (permalink)
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Cool

Quote:
Originally Posted by jtintle View Post
What step 3 does is make the folder writable, that way you can paste the new files in. In root explorer, it usually has a button at the top, with either rw or ro
It seems to me that in step 4,5,6 and 7 could be rephrased:

1. In "etc", move "A", to another folder - "X".
2. In "etc", change "B" to "A".
3. In "X", change "A", to "B".
4. In "X", move "B" back to "etc"

Is this sound logic?
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Old June 2nd, 2013, 06:31 PM   #21 (permalink)
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Quote:
Originally Posted by TheEmpathicEar View Post
It seems to me that in step 4,5,6 and 7 could be rephrased:

1. In "etc", move "A", to another folder - "X".
2. In "etc", change "B" to "A".
3. In "X", change "A", to "B".
4. In "X", move "B" back to "etc"

Is this sound logic?
That'll work to
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Old June 2nd, 2013, 06:41 PM   #22 (permalink)
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Quote:
Originally Posted by jtintle View Post
That'll work to
[Keep in mind, this is coming from someone who has bricked his first Android phone and now is working with a replacement - same model]

I have read thru the thread.

1. What are the overall risks of doing this [if any]?
2. Can you choose where to install apps after this?
3. Can you choose where to store stuff after this?
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Old June 2nd, 2013, 07:14 PM   #23 (permalink)
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Quote:
Originally Posted by TheEmpathicEar View Post
[Keep in mind, this is coming from someone who has bricked his first Android phone and now is working with a replacement - same model]

I have read thru the thread.

1. What are the overall risks of doing this [if any]?
2. Can you choose where to install apps after this?
3. Can you choose where to store stuff after this?
From what it looks like, it'll tell the phone to use your external SD card as SD card 1 and use the internal SD Card as SD card 2.

It doesn't change how the phone stores anything, just will give you more room on SD card 1, so you can move more apps to SD card...

If that makes any sense

Here are some pics of my storage after I did this:
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Old June 2nd, 2013, 07:45 PM   #24 (permalink)
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Post File Manager/Explorer - Which one?

Quote:
Originally Posted by jtintle View Post
From what it looks like, it'll tell the phone to use your external SD card as SD card 1 and use the internal SD Card as SD card 2.

It doesn't change how the phone stores anything, just will give you more room on SD card 1, so you can move more apps to SD card...

If that makes any sense
I think so. As long as there is no risk, I will give it a try.

EDIT: I have "File Manager" by Rhythm Software installed. It has a "Root Explorer" setting which in turn provides access to a "Mount System Folders" option. Is there another tool that is more straightforward to use to "Mount" the /etc folder as writable?
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Old June 10th, 2013, 10:57 PM   #25 (permalink)
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I got a dumb question.... can't you just tap "default storage location" and switch to sd card?
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Old June 11th, 2013, 04:27 AM   #26 (permalink)
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Now that is the perfect "dumb question".. I have that option on my non rooted Premia but it tells me that if I do that now (with a bunch of apps already loaded) some ongoing tasks will be closed and certain apps may not be able to use data stored on the internal storage.
I am going to go ahead with this and see what doesn't work. If your interested I'll post in a few days what I found problems with...
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Old June 11th, 2013, 05:38 AM   #27 (permalink)
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Quote:
Originally Posted by Tokenpoke View Post
I got a dumb question.... can't you just tap "default storage location" and switch to sd card?
Can you explain where this option is located? And, "SandMan46", let me know what happens? And, finally, how is this different from "jokerpks"'s method?
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Old June 11th, 2013, 09:21 AM   #28 (permalink)
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Quote:
Originally Posted by TheEmpathicEar View Post
Can you explain where this option is located? And, "SandMan46", let me know what happens? And, finally, how is this different from "jokerpks"'s method?
Settings> Storage> Default storage location
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Old June 11th, 2013, 10:10 AM   #29 (permalink)
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Quote:
Originally Posted by Spec2nirvash View Post
Settings> Storage> Default storage location
1. This message pops up:
Quote:
Internal storage or SD card is currently in use. If the SD card is set as the default storage location, the ongoing tasks will be closed and certain apps may not be able to use data storage on the internal storage. Continue?
2. Does this just apply to storage or will apps now be installed there as well?
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Old June 11th, 2013, 11:00 AM   #30 (permalink)
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That's what I'm wondering.
Gonna move my apps from sd today and find out
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Old June 11th, 2013, 11:07 AM   #31 (permalink)
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Seems to be moving apps to my 32gb card now...
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Old June 11th, 2013, 11:08 AM   #32 (permalink)
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That's what I'm wondering.
Gonna move my apps from sd today and find out
That's great! Maybe somebody can explain the advantages/shortcomings of this approach?

"jokerpks"'s guide might be used in one scenario and this in another?
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Old June 11th, 2013, 11:41 AM   #33 (permalink)
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That's great! Maybe somebody can explain the advantages/shortcomings of this approach?

"jokerpks"'s guide might be used in one scenario and this in another?

It appears that this does exactly what is describing the guide without the need for root
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Old June 11th, 2013, 11:46 AM   #34 (permalink)
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By that I mean sdcard and sdcard2 are now swapped as proven by the need to move storage locations in poweramp to sdcard and whatnot
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Old June 11th, 2013, 11:58 AM   #35 (permalink)
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By that I mean sdcard and sdcard2 are now swapped as proven by the need to move storage locations in poweramp to sdcard and whatnot
So, U need to be aware that some apps might need some configuration? i.e. Some apps might not "automatically' make the adjustment?

Q: I have come across the "idea" that some apps can not/should not be installed on an external SD card. Is this a factor? Or, does the OS figure this out automatically?
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Old June 11th, 2013, 12:11 PM   #36 (permalink)
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Easiest way to find out is to have a rooted phone, don't do the guide.
Copy the files you would have edited

Use the non root method.to change default storage

Copy files again (rename to make sure you don't write over the others)

Compare files in text editor.

If file a is now file b then this is the same process just without all the steps.

I'm not rooted so I can't do it.
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Old June 11th, 2013, 12:21 PM   #37 (permalink)
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I'm more interested in some of the questions I brought up in my last post.
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Old June 11th, 2013, 07:45 PM   #38 (permalink)
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I had exchanges with TheEmpathicEar, and he sent me some system info before and after using Tokenpoke's suggestion (just tap "default storage location" and switch to sd card).

Here are the File System Differences reported
Before
Code:
/dev/block/vold/179:33 /mnt/sdcard2 vfat rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro 0 0
tmpfs /mnt/sdcard2/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0
/dev/fuse /mnt/sdcard fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
After
Code:
/dev/block/vold/179:33 /mnt/sdcard vfat  rw,dirsync,nosuid,nodev,noexec,relatime,uid=1000,gid=1015,fmask=0002,dmask=0002,allow_utime=0020,codepage=cp437,iocharset=iso8859-1,shortname=mixed,utf8,errors=remount-ro  0 0
tmpfs /mnt/sdcard/.android_secure tmpfs ro,relatime,size=0k,mode=000 0 0
/dev/fuse /mnt/sdcard2 fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
All credit for this info goes to TheEmpathicEar. Thanks
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Old June 11th, 2013, 07:47 PM   #39 (permalink)
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Ah, well, [bow]. Could U interpret the results for us?
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Old June 11th, 2013, 07:58 PM   #40 (permalink)
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Ah, well, [bow]. Could U interpret the results for us?
It basically appears that the internal storage and external storage locations have been switched.
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Old June 11th, 2013, 08:05 PM   #41 (permalink)
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It basically appears that the internal storage and external storage locations have been switched.
Yeh, when I look at /mnt/sdcard now in Root Explorer [Tab: "Storage"], it's now my 32gig SD Card, and, there's many more file/folder(s) than there were before. When I click on [Tab: "SD"], it's now internal storage.

EDIT: I used the "Apps2SD" function of "All-in-1-Toolbox" to move some apps to SD [NOTE: This is a shortcut that identifies apps that can be moved] U can see the storage space for apps grow in the SD Card.
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Old June 11th, 2013, 09:27 PM   #42 (permalink)
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The only thing I've run into is my old calendar entries didn't carry over. Not that what I had saved was life changing. Otherwise the 80+ apps all appear to be working as expected.
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Old June 11th, 2013, 09:31 PM   #43 (permalink)
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The only thing I've run into is my old calendar entries didn't carry over. Not that what I had saved was life changing. Otherwise the 80+ apps all appear to be working as expected.
Have U installed any new apps? And, if so, did they install in the SD Card?
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Old June 11th, 2013, 11:35 PM   #44 (permalink)
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The only thing I've run into is my old calendar entries didn't carry over.
  1. Switch back (calendar should be returned)
  2. Export calendar
  3. Switch again
  4. Import calendar
Just a thought..
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Old June 11th, 2013, 11:47 PM   #45 (permalink)
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Calendar isn't a worry for me.. It's all old news... Been there done that! As far as the where a new app loads.. Let me try..
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Old June 11th, 2013, 11:57 PM   #46 (permalink)
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No, the new app does not appear to install to the SD card.
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Old June 12th, 2013, 07:01 PM   #47 (permalink)
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I've not bothered trying to set an automatic instal to sd for apps, I move mine manually in the application settings
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Old June 12th, 2013, 07:04 PM   #48 (permalink)
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Also, the os seems aware of What can and can't instal to sd.
There is no difference in the internal and external sd cards other than capacity and the risk of you accidentally opening your phone and removing the sd card without powering down or unmounting first
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Old June 12th, 2013, 07:06 PM   #49 (permalink)
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Also, the os seems aware of What can and can't instal to sd.
There is no difference in the internal and external sd cards other than capacity and the risk of you accidentally opening your phone and removing the sd card without powering down or unmounting first
Can U elaborate some on your first point?
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Old June 14th, 2013, 03:09 PM   #50 (permalink)
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Quote:
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Can U elaborate some on your first point?

The phone will move apps to external sd that have the built in apps2sd support. It work exactly as if installing to internal sd.
I've only had one issue moving an apps but it moved after uninstall and reinstall.
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