Android 4.4 KitKat removes your ability to write files to the MicroSD card (on phones/tablets that have both internal memory and user-installed MicroSD cards). NextApp SDFix restores this ability by modifying a configuration file. As this app changes a system configuration file, it requires root access.
WARNING! PLEASE READ BEFORE INSTALLING:
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* THIS APP REQUIRES ROOT ACCESS. IF YOU DO NOT KNOW WHAT THIS MEANS, PLEASE DO NOT INSTALL THE APP.
* This app is used to change a device configuration file.
* Please read this entire app listing for a description of exactly what this app does to determine if it is appropriate for your device and/or custom ROM.
* This app is designed to solve a specific problem. If you don't have that problem, don't install this app.
* This app is only useful on devices that have a user-installed MicroSD card. If you have a Google Nexus device or other device without a MicroSD card that you physically installed yourself, then this app isn't going to be helpful.
* This app is likely only useful if you have a stock ROM. If you're running an aftermarket ROM like Cyanogenmod, then there is no reason to install this app (good aftermarket ROMs don't suffer from the problem that this app corrects).
* NO WARRANTY: as is generally the case with all root modifications, you assume all risk by using this software.
* As with any root modification, ensure you have the knowledge to fully restore your device to stock if required.
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[ About MicroSD Cards in Android 4.4 / KitKat ]
When Google released Android 4.4, they specified that applications you download can no longer write to user-installed MicroSD cards. Apps can still write to internal flash storage. Some devices (like Google Nexus devices) only have internal storage, and are unaffected. Other devices (e.g. Samsung Galaxy and Note devices) have the ability to expand their storage space by installing a MicroSD card. When KitKat is installed on such devices, apps are limited to only being able to manipulate files on the built-in storage, with write-access to the MicroSD card being restricted.
This change represents a removal of functionality compared with Android 4.3. 4.3 allowed apps to write to the MicroSD card, as did prior versions.
The limitation introduced in KitKat does not affect the capabilities of preinstalled apps, only apps you choose to install. Apps preinstalled by Google, your device manufacturer, and your carrier still have this ability. Only apps that you choose to install are restricted.
[ Technical Details ]
NextApp SDFix will modify the configuration file located at /system/etc/permissions/platform.xml to allow apps to write to the MicroSD card. Specifically, SDFix will add the Android UNIX group "media_rw" to the WRITE_EXTERNAL_STORAGE permission's configuration. This will enable apps (only those that you granted write access permissions to when you installed them) to write files to the MicroSD card. On many devices, this is effectively reverting the state of this permission back to the way it was configured in Android 4.3. This modification is carried out by modifying the existing XML file, rather than replacing it.
A backup of the original configuration file will be saved at /system/etc/permissions/platform.xml.original-pre-sdfix (provided one does not already exist). Reverting this modification can be accomplished by using a root -enabled file manager to replace the /system/etc/permissions/platform.xml file with the backed up version.
[ Additional Information ]
This app is free and has no advertisements (with the exception of links to other NextApp apps when it completes its task).
--- Please do not contact me with requests for information on how to obtain root access on your device. The process is different for every device, and often requires technical expertise to install. ---
Brian Balogh
I searched Google for a problem I was having with Quickpic not being able to delete my pictures on my extSD card thanks to the 4.4 limitations, and came across this app. I had all the needed requirements and ran the app and it took less than a second to apply the patch. Restarted my phone and loaded up Quickpic and I'm now able to delete pictures. This is just the app I needed. Thanks.
Rated: 5 Star
Neko Eyes
Worked perfectly and the ui is beautiful and amazing! No more moving songs from SD to internal to edit tags! 🙌
Rated: 5 Star
Dan Q
I bought DOSBox Turbo for my NVIDIA Shield Tablet, but was unable to use my ~3 GB of DOS games on my newly-purchased 128 GB SD card, as the read only state of the card would cause most games to fail. Not wanting to waste tablet space, I did some searching and reading one night on how rooting works and how to do it. Then I found SDFix, solved the problem completely! BTW it works on Lollipop too.
Rated: 5 Star
Vika Hauber
This fixed the problem that was plaguing my SD card in my Note 2 after I flashed back to a stock ROM. I was unable to store anything on my SD card, and apps couldn't read anything on it. I installed this app to fix it, and at first it didn't work (stuck on orange screen for >5 minutes) because my root access through SuperSU broke. After I re-installed SuperSU and got that working properly, I ran this program once again and 5 seconds later I had a working SD card. I don't know what I would have done without this app. Also I am on 4.4.2.
Rated: 5 Star
Daniel Xeronet
Trying to move a folder of music. it wouldn't do anything before. After this it made the folder on the sd card but failed to move mp3s
Rated: 5 Star
James Richardson
External storage was read only before I used this app. Thank you very much. Worked on Lollipop 5.0.1 on my G3, even if it says for Kit Kat.
Rated: 5 Star
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