How to find out security breach from the log file?

Hi Everyone,

I would like to ask support in interpreting the log file. I suspect that someone accessed my laptop and want to find it out from the log files, however in the Connections_incoming text file I can see only records from 2016. 

So I thought I check the TeamViewer12_Logfile, but it contains so many records I don't know what to look for. 

Could you please help me understand which records are showing the incoming connections and how to find out if file transfer happened or not?

Thank you in advance.

Kind regards,

Roland