If you are buying a laptop, upgrading a computer or simply trying to understand a specification, you will soon meet two terms: SSD and HDD. Both are types of storage, which is where your operating system, programmes, documents, photos and games are kept. They do the same basic job, but they work in very different ways, and that difference affects speed, durability, noise and price. This guide explains both in plain language, so you can choose with confidence. Think of storage as a filing cabinet for your computer. When you open a programme or a file, the computer takes it out of storage and loads it into memory, where it…