When I bought a camera couple of years ago it came with a 'new' un-packaged SD Card.
All my devices take Micro-SDs, so I have never used it. But I bought a card reader in the DSE final sale.
It turns out the 'new' SD card has photos in it from three cameras ... including some photos of quite a 'personal' nature. I've formatted the card, but some things you can't un-see.
The vendor (independent retailer) has since closed shop.
Moral of the story - if you borrow a camera or card be careful to delete any pictures you snap!!