This rucksack belonged to Harry Potter.
Before leaving 4 Privet Drive for the last time in July of 1997, Harry packed it with everything he felt he would need while searching for Lord Voldemort's Horcruxes. He almost lost it during the Battle of the Seven Potters, but managed to keep hold of it.
The contents of the rucksack included:
- Muggle clothing
- The Invisibility Cloak
- Potion-Making Kit
- Certain books (including Practical Defensive Magic and Its Use Against the Dark Arts)
- The photograph album from Hagrid
- A stack of letters
- Harry's wand
- The Marauder's Map
- Regulus Black's locket