Transfer of files via USB charger

I plugged a usb charger into my android phone and a computer at Univeristy. The phone kept asking for MPT access which I denied. It kept flicking from charging to transferring files. No files were physically transferred to my knowledge as I connected the phone purely to charge it. I have some private pictures from my laser hair removal journey that I had deleted from my phone. Is it possible that when I connected the phone to the PC that thumbnails/cache could have been automatically saved/transferred to the computer. Can my private images be recovered from this computer or am I worrying about nothing? What steps should I take?
Please reply. I am very worried about this.

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Further reading and what to do next.
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make a "no data" charging cable
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Security risk

So are you saying that pictures would have been saved on that computer?

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You are the one who....

...said it was transferring files. If I was you, I'd go ask someone at the university who would know. I would also complain based on what you observed.

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Security risk

Okay I will do that. Would it make a difference if the pictures had been deleted. The pictures were not physically present on my phone when I was charging it as I deleted it. Is it possible for deleted files to be transferred?

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As you can guess it won't matter.

It just determines if the attacker is going to go the extra mile to get deleted items.

For most attacks no one really is interested in pictures but more interested in financial information. Unless you are Katy Perry.

That's the thing. if you ask "is it possible?" then the answer is yes. As to what happened, you would get a security expert or team to try it again but with a lot of sniffers to see what the attacker is going after. It's unlikely this will happen.

My parting advice is to NEVER use other than your own charger or if you must, get a charge only or no-data cable.

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