What is SSD?

In plain English

SSD stands for "solid-state drive" — it's the part of your computer that stores everything: Windows, your programs, your photos, your documents. Think of it as your computer's filing cabinet, the place where all your things are kept even when the machine is switched off.

The older kind of storage, a traditional hard drive, works a bit like a record player — a spinning disc with a little arm that physically moves to find your files. An SSD has no moving parts at all; it's more like a big memory stick built into the machine. Because nothing has to spin or move, it finds your files almost instantly — which is why a computer with an SSD switches on, opens programs and loads photos so much faster.

Why it matters

If your Windows PC or laptop takes an age to start up, hangs on the spinning circle, or grinds away whenever you open a folder, an old-fashioned hard drive is very often the culprit — not a virus, and not a computer that's "past it". Swapping that drive for an SSD is the single biggest speed boost most older machines can get, and it usually costs far less than a whole new computer. For a home user it means less daily frustration; for a small business it means staff aren't sitting idle waiting for a sluggish PC, and a tired-but-otherwise-fine laptop can earn its keep for a few more years.

What to do

• Notice the symptoms first. Slow start-up, long pauses opening files, and constant "thinking" are classic signs of an ageing hard drive — worth checking before you spend on a replacement machine.
• Check what you've got. On Windows, the Task Manager (right-click the taskbar → Task Manager → Performance) will show whether your drive is an SSD or an HDD — but don't worry if that means nothing to you, it's a quick thing for a techie to confirm.
• Ask about an upgrade before replacing. Many laptops and desktops from the last decade can take an SSD, and your files, photos and email can be copied across so everything looks just as you left it.
• Keep backing up. An SSD is fast and reliable, but no drive lasts forever — a separate backup of your important files is always your safety net.

How 365 Techies can help

If your computer feels slow, we can tell you honestly whether a quick, affordable SSD upgrade would breathe new life into it — before you spend on a brand-new machine.

Related: Hard drive · RAM · Operating system · Megabytes & gigabytes — or browse the full A–Z jargon buster.