Crossword 6C

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Across
  1. 4. to make sth ready
  2. 7. find out
  3. 9. a spare copy of a file
  4. 10. an unknown person
Down
  1. 1. to store computer data
  2. 2. round door handle
  3. 3. to make a duplicate
  4. 5. a secret code or word
  5. 6. a small computer camera
  6. 8. advanced