File Storage with security in Android -


My application is downloading books (zip) via in-app purchase.

I have to ask whether there is a way in Android that allows to store these books in SD card or external storage with security So that another file manager can not delete it ?

Any help would be appreciated

saved in external stores The files that are world-readable and enable USB mass storage to transfer files to computers when they can be modified by the user.

Source:

So you can not do not the SD card as if you want that no one can remove them. But you can use internal memory:

By default, files saved in internal storage are private to your app and other applications can not access them (nor do the user). When users uninstall your app, these files are removed.

Source:

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