Solid-state drives have been a huge upgrade over old mechanical hard drives — they're faster, quieter, and far more shock-resistant. But SSDs are not immortal. Every flash cell has a limited number of write cycles, and when an SSD does fail it tends to fail suddenly, with very little of the warning noise an old spinning disk would give you.
If your computer is starting to behave oddly, you owe it to yourself to find out whether the drive is the cause. Here are the seven most common signs we see across Edinburgh — from Leith and Stockbridge to Corstorphine, Musselburgh and Penicuik — that an SSD is on its way out.
1. Files Suddenly Become Read-Only
One of the earliest warning signs of a failing SSD is the operating system flipping the drive into read-only mode. You can still open documents and applications, but you can't save changes, install updates, or move files onto the drive. Windows might show errors like "the file system is read-only" or "operation could not be completed".
This is the SSD's controller protecting whatever data is left. If you see this, stop using the drive for new work and copy your important files off straight away.
2. Frequent Freezes, Crashes and Bad Blocks
If your PC freezes for several seconds when you try to open a file, or you start seeing "bad block" or "CRC" errors in Event Viewer, the drive is struggling to read or write to certain cells. On Windows 11 you might also notice the dreaded Blue Screen of Death appearing more often, especially during boot or while saving large files.
3. The Drive Disappears From the BIOS
An SSD that vanishes from the BIOS, comes back after a reboot, then vanishes again is a classic sign of a dying controller chip. NVMe drives in particular can fail this way — Windows boots normally one day, then on the next reboot the system reports "no bootable device". If this is happening intermittently, treat the drive as terminal and back it up immediately.
4. Boot Times Have Crept Up
SSDs are supposed to boot Windows in seconds. If your laptop now takes a minute or more to reach the desktop, or hangs on the spinning dots, the drive may be reaching the end of its life. A few other things can cause a slow boot — too many startup apps, a failing battery, dodgy Windows updates — but the steps in our guide to speeding up a slow Windows PC will help you rule those out before pointing the finger at the SSD.
5. SMART Health Status Is Warning You
Every modern SSD reports its own health through a system called SMART. Tools like CrystalDiskInfo (free) read these values and give you a quick "Good", "Caution" or "Bad" verdict. The numbers worth checking are:
- Percentage Used / Wear Level — how much of the drive's write endurance you've consumed.
- Reallocated Sectors / Bad Blocks — cells the controller has marked as unusable.
- Available Spare — the pool of spare cells used to replace bad ones. When this gets low, failure is close.
A "Caution" rating doesn't always mean immediate death, but it's the universe handing you a free warning. Take it.
6. Files Are Becoming Corrupted
Photos that won't open, Word documents that crash on save, video files that suddenly stutter halfway through — when individual files start corrupting for no obvious reason, the SSD's flash cells are losing their ability to hold data reliably. This is a particularly nasty failure mode because backups taken after the corruption starts may already contain damaged copies. If you spot this early, our data recovery service can often pull clean versions from the unaffected sectors.
7. Your PC Refuses to Boot at All
The final stage. The system powers on, the fans spin, but you get a black screen, a flashing cursor, or a "no operating system found" message. If you've ruled out the obvious culprits in our PC won't boot guide and the drive isn't appearing in the BIOS, the SSD has likely failed completely.
The good news: even at this stage, data recovery is sometimes possible if the controller chip can be coaxed back into life or the NAND flash read directly. Don't keep powering the system on and off — that often makes things worse.
What to Do If You Spot These Signs
- Back up everything you can, right now. Plug in an external drive and copy the most important files off first — documents, photos, anything irreplaceable.
- Don't run a "repair" utility on a failing SSD. Tools that defrag or rewrite the drive can finish off a marginal one.
- Get a SMART report. This tells a technician exactly how much life is left and whether recovery is realistic.
- Plan a replacement. A modern NVMe SSD is a worthwhile hardware upgrade, not just a like-for-like swap — newer drives are faster, more reliable, and much better value than they were two years ago.
How We Can Help
At PC Repair Services Edinburgh we deal with failing SSDs every week — from MacBook Pros in Bruntsfield to gaming rigs in Dalkeith. We can run a full SMART diagnostic, recover what's still readable, and fit a new drive with a fresh, properly-licensed copy of Windows or macOS so you're back up and running fast.
We offer in-shop work, our home and office callout service across Edinburgh and the Lothians, and remote help where it makes sense. Book a diagnostic or get in touch and we'll let you know the next step.