7 apps I use to lock down, encrypt, and store my private files - and most are free ...

Android lets you protect your device by creating a password, PIN or gesture lock to keep people from using your phone without your permission. But what if you don’t want to secure your entire device?

Imagine working on a key document in Google Drive, only to find out later that someone made unwanted changes. To prevent this, Google Drive lets you lock files for editing, ensuring only you can ...