He copied files from my phone?

[AC Question]

I went for lunch with a guy I don t know very well and during conversation my Samsung phone battery died. He offered to charge it for me since he had his charger with him. After a while I went to the bathroom and when I came back he seemed a bit suspicious and I noticed he was now charging my phone from his laptop not charger.
My paranoid mind starting thinking about it afterwards and I m trying to think what he could possibly either be copying from or copying to my phone?
Any ideas and what precautions can I take?
I was in the bathroom maybe 2 minutes.

 

[11B1P]

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