21drive – SMB & NAS Transfer

Transfer selected files and folders from Android directly to your SMB server, NAS or Windows share.

Configure servers and destination folders, share files to 21drive from other apps, or schedule recurring uploads. Track transfers through progress indicators, a queue and transfer history.

21drive is designed for users who manage their own shares and credentials. You need a reachable SMB server and appropriate access permissions. Transfers upload files to your destinations; this is not two-way synchronization.

The app is completely free, with no Pro subscription or paid feature unlocks. Files travel directly to the servers you configure. Saved credentials are encrypted locally using Android Keystore. Network encryption depends on your SMB server and connection settings.

Try the built-in Demo Server to explore the interface without setting up a server. Demo transfers are simulated.

Scheduled and ongoing transfers depend on network availability, access to source files and your Android device's background restrictions.