Learn how to create an intelligent backup solution that mirrors your external SSD drive from a Raspberry Pi to a Synology NAS, complete with real-time monitoring and smart file deletion handling. This comprehensive guide demonstrates how to maintain perfect backups of your photo library while preserving deleted files in a separate '_deleted' folder with their original directory structure intact.
Building Backup from RPi attached USB-SSD with Immich photo source to Synology NAS
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