Android Photo Backup App Development

I'm seeking an experienced Android developer to create a native photo backup application. The app will primarily target users who want to securely back up their photos incrementally onto OTG an storage every time the device is connected.

Key Requirements:
- Automatic backup of photos
- Backup to local storage (SD card)
- Additional features:
- Backup scheduling
- Encryption for photos

Ideal Skills and Experience:
- Proficient in Android app development
- Experience with local storage management
- Knowledge of encryption techniques
- Familiarity with implementing backup scheduling

Looking for a developer who can deliver a secure, user-friendly, and efficient backup solution. Please provide samples of previous work.