FreeFileSync Forum

Thanks so much!!!! You are very kind!

No! When i hold my mouse over the icons of the up row, there is no text shown! And this is a bug happening on my mac.
When i hold my mouse over the icons of the down row there is text shown.

So please can someone explain what is the meaning of these 5 symbols? I cannot work the software if i don't know that...

In 1.jpg the mouse cursor is on the middle green arrow (under the thunder) and the label is "Update right item". Unfortunately you can't see the mouse cursor, because i took a screenshot on mac.
In 2.jpg the mouse cursor is on the thunder (above the green arrow) and there is no label showing.
So i ...

On mac Sierra 10.12.4 and freefilesync version 9, in synchronisation settings-mirror: there is no label when you put the mouse cursor on the category icons. So i don't understand what exactly is each icon.
By the way, can someone tell me what each icon is?

I have the synology DS216J and i want to keep a backupof all the data on an external hard drive connected to my pc.
Which is the right way to do it? Choosing two way or mirror?
I am afraid to use two way because i am not sure which data will be syncronised. I want the data from the NAS to be copied ...