Smart phones are frequently lost or stolen. Consequently, you should password-protect any Vault 3 documents containing any data that you would not want to fall into the wrong hands. Also, you should specify a screen lock PIN and a short screen timeout. Screen lock PINs are more secure than patterns, because patterns can often be deduced by inspecting the smudges on the phone's screen.
When you password-protect a Vault 3 document, that document is securely encrypted. To password-protect a Vault 3 document, open that file in Vault 3. Select File on the Action Bar.
Click the "Password" button. Make sure the "Require a password" checkbox is checked. Enter a password. Note, passwords that are simply one or more words found in a dictionary are less secure. Remember your password! You will not be able to open a password-protected Vault 3 document without it.
You can choose to have Vault 3 save passwords in memory, to avoid having to enter the password every time you open a password-protected document. To enable password caching, click the Menu button, and then click "Settings", and check the "Cache Passwords" checkbox. Cached passwords are stored in Vault 3's memory (RAM), not on persistent storage. When Vault 3 is run after being shut down by the system, passwords will have to be re-entered.
Go to the "File" tab. Long-click a file and click "Remove", "Rename", or "Copy".
Vault 3 is available for desktop computers. Click Vault 3 Desktop Versions to download a desktop version of Vault 3. The desktop versions of Vault can manipulate the same documents as the Android version, provided the desktop version is at least 0.39.
Synchronizing your Vault 3 documents to the cloud can be very convenient, especially if you run Vault 3 on desktop computers and/or multiple Android devices. There are various ways to synchronize Vault 3 files to the cloud:
The method that I use is the following:
Another option for cloud sync is the following, which works best for pre-Nougat versions of Android: