OneWaySync

Simple, safe, one-way folder mirroring — with your Photos and Music libraries included. OneWaySync keeps exact mirrors of your folders on external drives, NAS, USB sticks or anywhere else. Synchronization is strictly one-way: the source is only ever read, and after the first copy only new and changed files are transferred. Drag a source, drag a destination, press START. And it goes beyond folders: connect your Photos library or your Music library with one click, and OneWaySync copies your photos, videos and songs into plain, neatly organized folders — readable from Windows, TVs, media players and any backup tool. FOLDERS ▪ As many sync setups as you want, each with its own folders and options. ▪ Optional mirror mode ("Delete on Destination") removes files you deleted from the source — or leave it off to keep everything ever copied. ▪ Mix several sources into one destination by pointing multiple setups at the same folder. ▪ Copies hidden files (optional) and Finder label colors. ▪ Follows folders even if they are renamed or moved. PHOTOS AND MUSIC ▪ "Use Photos Library" copies your photos organized by date or by album — you design the folder and file names with simple tags. ▪ Copy edited photos or untouched originals, convert photos to JPEG, resize to a maximum size. ▪ "Use Music Library" exports songs, music videos and playlists — playlists become real folders. ▪ Filters choose exactly what gets copied. ▪ Old iPhoto and iTunes libraries from older Macs are still read directly. SET IT AND FORGET IT ▪ Scheduled synchronizations: weekly, or repeating every few minutes. ▪ Queue setups to run one after another, or run them at the same time. ▪ Quit, sleep, shut down or run a custom script when everything finishes. ▪ Safe to cancel at any time — continue later from where it stopped. ▪ Every operation can be written to a log file. ▪ Fully scriptable with AppleScript. FAQ • Is my source folder or library ever changed? Never. Sources are only read; files are copied out of them. • What happens when I delete files at the source? Your choice: with "Delete on Destination" enabled, their copies are removed on the next sync, keeping a perfect mirror. Leave it off to keep everything that was ever copied. • My photos are in iCloud — does this work? Yes. If "Optimize Mac Storage" is enabled, photos are downloaded automatically as they are copied. • Is it safe to cancel an ongoing synchronization? Yes, at any time. The next sync can continue right where it stopped. OneWaySync requires macOS 11 or later.