Hoarder's mentality

 A hoarder is a person who collects and keeps a large amount of things and has difficulty throwing anything away, even things that most people would consider useless.

This often leads to cluttered, crowded, or messy living spaces.

👉 The behavior can be mild (just keeping too many things) or severe (linked to hoarding disorder, a psychological condition).

• He keeps every newspaper he has ever bought — he’s a bit of a hoarder.
• Her garage is full of old boxes because she’s a hoarder.