<human>: Can you condense the text into three sentences or less?

Hi Reddit, I will try to make this as brief as possible.

I recently deleted some videos and pics of my father's birthday party on my mother's external hard drive, I did this and they went to the recycle bin where I clicked "empty recycle bin". 

I did this because my mother thinks that I have no contact with my father (long story).

So fast forward to today, where I was looking through this external hard drive on my mother's computer, where to my horror, I happened to come across the pics and videos in her computer's recycle bin!

I quickly put the external hard drive back into my computer and emptied the recycle bin again. This time when I returned to my mother's computer and checked out the recycle bin they were all gone.

But I now feel like I can't be sure.

So can someone please give an explanation to why those vids and pics were reappearing and how can I make certain they wont pop up again, or have those files appearing on her computer(I did not transfer these files across FYI).
<bot>: Files only appearing through recycle bin on another computer how can I be sure they haven't been left behind? and how can I be sure they are now permanently deleted?