how to delete dirs/files by existing at other location

[Big11]

I have two similiar NAS which one is used for backup...

But now i want to do a cleanup by deleting Dirs and Files at the "Backup-NAS" which exists at the "Main-Nas"

i tried some comparsion options but not be sure to not making Errors and delete some i don't want.

can anybody here give me some hint how to configure FFS to archive this goal ??

Thnak you

[Plerry]

FFS is a sync tool, not a de-doubler or cleanup tool.

[Big11]

FFS is a sync tool, not a de-doubler or cleanup tool.

And for which purpose is the Option "comparsion"?...

[xCSxXenon]

Well, you could run a comparison, show only equivalent items, select all on the backup-NAS side, and then delete it

[Plerry]

> And for which purpose is the Option "comparsion"?...

What about being able to detect which files require sync actions ...

Besides that: "comparison" is not an Option; it is a mandatory step in the flow of running a sync.
The only thing "optional" about it is the compare method variant.