Wallets can be dragged from the KWallet Manager window. This allows you to drag the wallet to a file browser window, where you can choose to copy, move, or link the wallet, as desired.
You might use this to save a wallet to portable media, such as a USB keychain, so that you can take your passwords with you to work or on a vacation, and still have easy access to important sites.
Future versions will have built-in functions for easy export or copying of data to portable devices.