Why should you save your receipts?
Its a lot easier to get a replacement or refund if you have to your receipts to hand.
(it’s still possible without but a lot harder, but I’ll save that for another time).
As a rule of thumb, save all receipts for a minimum of 2 weeks, and big purchases for 2 years.
Now if any thing breaks before its time, it’ll be easy to take it back to the shop for a replacement.
As an added bonus you can now prove that you owned the item if you need to claim on insurance.