Hard disk drives undeleted data.

The ICO said two of the purchased hard drives had
enough information to steal someone's identity 

One-in-10 second-hand hard drives still contain the original user's personal information, suggests an investigation by the UK's Information Commissioner's Office (ICO).

The quick brown fox jumps over the lazy dog.

The phrase shown in metal moveable type, used in printing presses.
(Image is mirrored for readability.)

"The quick brown fox jumps over the lazy dog" is an English-language pangram, that is, a phrase that contains all of the letters of the alphabet. It has been used to test typewriters and computer keyboards, and in other applications involving all of the letters in the English alphabet. Owing to its shortness and coherence, it has become widely known and is often used in visual arts.