Save keyfile in internal storage

[tomfitzhenry]

I want to use a keyfile, but would prefer if only keepshare was able to see the keyfile. That is, I do not want it in external storage (sdcard), nor Google Drive.

The usual mechanism for this is Android internal storage.

Do you think that's a good place to import it to? (The user would be left to remove the old copy from external storage, if they wanted)