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Did you try to write files on your external SD card? Google has blocked the write access to External SD card for third party apps on Android 4.4. Lots of apps became useless on KitKat. You can try upgrading your Android system to 5.0+. Also please try using your mobile default file manager to read or write files to see what will happen.


My device is HTC One M7 I managed to find the OTA by doing a dumpsys | grep .zip I was already in a adb shell su session as the file was being downloaded,(after I exited and re-entered the shell and tried to run the dumpsys command I couldn't find it. I'm guessing dumpsys works on a temporary log.) eventually I found it in the /data/data/


For this you need either access via adb (adb shell) or a terminal app. At the prompt, execute mount | grep "/data" The output will have something like /emmc@usrdata /data ext4 rw,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered 0 0 The third column tells you the file system used (in the example above: ext4). Of course there are also several ...

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