Narrator: HOW TO DELETE A FILE
T-Rex: Highlight the file and press delete! DONE.

T-Rex: Onlyyyy that just moved it to a temporary buffer. Right!

T-Rex: This buffer is called a "trash can" or a "recycle bin" because of metaphors. Okay, to delete a file, highlight it, delete it, AND empty the buffer it's moved to.
Dromiceiomimus: Only THAT just deleted it from the file table, but the data's still recoverable on the disk.

T-Rex: OKAY. Delete the file, and THEN, rewrite the data on the disk with something else.
Utahraptor: Nice!

Utahraptor: Buuuuut it could still be recovered forensically.
T-Rex: DELETE THE FILE, PURGE THE BUFFER, OVERWRITE THE DATA WITH AN ALTERNATING SERIES OF 1S AND 0S TEN TIMES, and then - then! - your file is finally deleted!

Off panel: True! But have you done the same with any temporary files or shadow copies? Did you remove any offsite or cloud backups? What if they use a soft delete and -
T-Rex: NEVERMIND, DATA IS FOREVER, JUST NEVER WRITE ANYTHING THAT YOU DON'T WANT WEIRDOS TO READ