Where is hidden additional data of an app stored?



  • This question came to my mind when I installed Oxford Dictionary. It's strange that I couldn't see the additional files (audio, dictionary, and pictures) in an unrooted device. This app has a base app (idk what it's called) and it will download the additional files through the app (these files are not automatically downloaded when the app's installed from playstore).

    The reason I need to know the storage placement is, so I could copy the additional files and paste to let's say SD Card or OTG memory stick and ditto to my other device, so that I needn't download it again because the file is quite huge.

    The problem is I couldn't find it anywhere. Is it because my phone is unrooted since it's probably stored in deep storage that requires root to modify it? If that so, at least, when I check the properties of the storage of the app i.e. that is placed in Android > data, (the name of folders are usually started by "com. xxx") the file size shows 0 kb that means nothing's there. At first, I assume it happens because my device is unrooted and I came across with this discussion https://www.quora.com/How-do-you-see-hidden-system-files-on-your-Android-without-root that I can actually see the root files (using MiXplorer), but I can't modify it. Well, even if I couldn't modify it, at least, I should be able to see them. However, I've searched the files everywhere and I still couldn't find them. What's the problem?

    It says there that it's stored in internal storage and usually oxford products are saved in Android / data / package name

    enter image description here

    However, this is what I mean when the file size is 0 and there's nothing in there. I'm using MiXplorer btw and I've tried to check in root storage.

    enter image description here

    Anyway, Is it possible to find and copy the hidden additional files? Using app or maybe with the help of PC using certain software I can?



  • Is it possible to find and copy the hidden additional files? Using app or maybe with the help of PC using certain software I can?

    yes, if your device has previously unlocked bootloader and Magisk installed, you can read/check size of

    /data/user/0/com.oup.elt.dicts.bilingual/files
    

    otherwise connect your phone via adb, create backup and extract it (see linked questions)

    adb backup com.oup.elt.dicts.bilingual
    



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