FreeFileSync Forum

Ok, I just tested FileGee, if i set "incremental backup" to automic delete old version, it will delete old copy even after failed backup.

So you disabled the existing ways to safely backup data and want another way implemented?
FFS, by default, does not delete the existing copy until the new copy is fully transferred with the .ffs_tmp extension appended. Once fully transferred, it deletes the existing copy in the destination and ...

And thank FreeFileSync's authors for the great software. Use FreeFileSync & the custom config is the closest thing I can get as atomic mirror.

Following content is something I discovering while trying to get atomic mirror. I hope this will be helpful to someone else.

1 Implementation Considerations

(1) filesystem features

At first, I thought about filesystem features. But this only works with directly attached storage, rather than ...

The Atomic in title is the same Atomic as Database "ACID".

1 Backgroud

I use FreeFileSync to mirror my internal hard drive's file to external hard drive. And I find out if I set "Delete files" option to "Permanent", when FreeFileSync is mirroring file, it will first delete target's orphan file ...