uhh backpack you idiot..
That would be a backpack.
A knapsack is a bag with shoulder straps that is carried on the back. It is usually made out of canvas o other weatherproof material.
rucksack
You are describing a backpack.
A rucksack or (backpack, haversack, knapsack, packsack) is a bag carried by a strap on your back or shoulder.
a bag carried sometimes by school children
It is called a backpack or, less often now, a rucsack.
No, "carried" is the past tense of the verb "carry." The present tense form is "carry."
A canvas or leather bag for clothes, food or other supplies carried on the back (or over the shoulder)
Baggage is luggage used to hold your clothes etc when you are travelling. A back pack is luggage designed to be carried on your back.
It was a bag in which he carried money in
The 'bag' arrows are carried in is called a quiver.