Android devices allow you to hide files in secret folders, which can be very useful if for example, you have someone snooping through your phone without your permission. In order to reverse this feature, the device also lets you display these hidden files.
Display Hidden Files on Android
Open the File Manager. Next, tap Menu > Settings.
Scroll to the Advanced section, and toggle the Show hidden files option to ON:
You should now be able to easily access any files that you'd previously set as hidden on your device.
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