Source check for mirror HDmaster => HDbackup

[fenece]

Hi, I want to know if there's some SOURCE CHECK method (not only drive letter) before sync started.
I'm synch every 1 month with FreeFileSync my hard disk to another backup hard disk with MIRROR sync.

But if i ACCIDENTALLY click on button SWAP SIDES and than i launch a sync, I'll lost all my last month data.

So I want to know If is possible to disable the button or if there's other tips.

Thanks a lot
Marco

[Zenju]

See FreeFileSync help file chapter "Variable Drive Letters".

[fenece]

OK thanks.... for drive letter I've see the "Variable Drive Letters".

For button SWAP SIDES any tips?