Safety options -> mirror copy

Discuss new features and functions
Posts: 2
Joined: 14 Jul 2026

zacky

Would it be possible to add the following safety options to FreeFileSync?

Unattended File Deletion Allowed with a configurable percentage limit (e.g. if more than x% file deletion from left or right side, do nothing, stop the job, send email).
Ransomware Protection with a configurable replacement threshold (e.g. if x% of files replaced on left or right side, do nothing, stop job, send mail.).
Files Protection -> (e.g. If job would delete more than x files on right or left side, do nothing, stop job, send email.)

These features would help prevent accidental mass deletions or file replacements during unattended synchronization jobs.

Thanks.
User avatar
Posts: 2978
Joined: 22 Aug 2012

Plerry

What is presently available, is the warning
"The following folders are significantly different Please check ..."
That warning is enabled by default, but can be turned on or off via FFS's main menu
Tools / Options and "Show details" behind "Show hidden dialogs and warning messages again"
Posts: 2
Joined: 14 Jul 2026

zacky

Would it be possible to add, in a future version, the option to define a percentage threshold for the differences between folders according to our requirements?
The reason is that sometimes an error is reported even though everything is actually fine with our synchronization files.