School computers

Hi my name is David im from Mexico. I need your answers
Can anyone see what I copied from the schools computer and what have I saved?
I'm user in the school's computers and i using username and password to use this computers.

Everything thats been done over the server can be traced, yes. That is everything from mail, browsing history and downloads.

Local files are retrievable from the physical hard drive.

Of course it all depends on the school's purge policy.

Programvara - Windows --> IT-säkerhet: allmänt
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If you only copy things from the harddrive to external storage, most likely not. If you access resources on the internet, maybe.