How to Safely Remove SD Card from Android
If the SD Card on your Android device can be removed without turning off your phone, it is better to unmount it for a safely remove. To safely remove ...
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There is a default feature on Nexus 7 with Jelly Bean 4.3 that clear the cached data for all app at once, without installing any third party apps. To clear cache on Nexus 7 2013 do as follows:
1. Open Settings application
2. Go to Storage.
3. Tap on Cached Data and confirm the "Clear Cached Data" process
To clear the cached data for applications individually, go to Settings > Apps > Open an Application > Tap Clear Cache button