If an SD card has stopped working and the family photos on it are the only copies, the most useful thing you can do right now is stop. Take the card out of the phone or camera, put it somewhere dry and safe, and do not let any device write to it again.
In most corrupted cards the photos are still there. What has failed is the index that tells a device where each file begins and ends, not the images themselves. Every extra minute the card spends in a device that wants to help by fixing it is a minute that index can be overwritten.
Below is what to check for free first, what those alarming prompts actually mean, what recovery software genuinely can and cannot do, and the point at which the card should go to a laboratory instead.
The first ten minutes: what to do and what to avoid
Nothing else matters as much as keeping the card unwritten. Work through this in order.
- Power down and remove the card. Shut the phone or camera off first if you can, then eject it. Do not leave it sitting in a device that keeps trying to mount it.
- Do not tap Format, Repair, Fix or Set Up. Every one of those buttons writes to the card, and one of them is usually fatal to the recovery.
- Do not shoot anything else on it. A single new video can land directly on top of the photos you want back.
- Stop reinserting it. Each mount attempt gives the device another chance to write a fresh filing system or a journal entry.
- Do not run one recovery tool after another. Repeated deep scans put a failing card under load for hours, and some tools write their own repair data straight onto the patient.
- If the card is wet, keep it out of a reader. Do not use a hairdryer, an oven or a bowl of rice. Seal it in a small bag and bring it in as it is.
- Label it. Write down which device it came from, roughly what is on it, and what happened just before it failed. That history genuinely shortens the work later.
If the card still mounts on a computer and you can see the DCIM folder, copy everything off to a laptop or external drive immediately, before trying anything clever. Copy, never move.
Free checks that cost you nothing
A surprising number of "lost forever" photo sets turn up in one of these places within five minutes. Do these before you spend a cent.
- Gallery Trash or Recently Deleted. Samsung Gallery, Google Photos and most camera apps keep deleted items in a bin for a period of weeks before purging them. Open it on any device signed in to the same account.
- Cloud backup you forgot was switched on. Check photos.google.com, Samsung Cloud, OneDrive, Dropbox and any auto-upload you enabled once and never thought about again. Sign in from a browser rather than the phone.
- Copies you already sent. WhatsApp and Telegram chats, family group chats, email attachments, photos shared to a school or work group. These are often full-quality enough to be worth having.
- Older devices and drives. The previous phone, an old laptop, or the backup drive in the drawer. If that backup drive has also stopped being recognised, treat it the same way and read our guide to external hard drive recovery rather than forcing it.
Anything you find this way is a free win. It also tells you exactly which photos are genuinely missing, which is useful information when a laboratory later hands you a file list to check.
"SD card is damaged. Format SD card?" — why formatting is the trap
That prompt is not a diagnosis. Android is saying one thing only: it cannot make sense of the filing system on the card. The photos are usually still sitting in the flash memory, untouched. It is the map that is damaged.
Tapping Format replaces that map with an empty one. Recovery after a format is sometimes still possible, which is why the situation is not hopeless if you have already done it. But it is a gamble with no upside, and it gets worse in three ways.
- Some phones and cameras follow a format with a wipe or a discard instruction that tells the card's controller those blocks are now free. Once flash blocks are released internally, no software on earth can bring the contents back.
- If the card is genuinely failing rather than merely confused, the format can be the write that finishes it off.
- Even a successful recovery after formatting comes back without folder structure, filenames or dates. Twelve years of organised albums return as a heap of numbered JPEGs.
The same logic applies on a computer. Decline Windows when it offers to scan and fix the drive, and do not run chkdsk on a card holding irreplaceable photos. Both write to it. If the damaged-card prompt keeps reappearing, that is the moment to arrange SD card recovery rather than keep clicking.
Already tapped Format? Stop using the card now, do not put it back in the camera, and have it looked at. What was written since matters far more than the format itself.
Camera cards, phone cards, and cards adopted as internal storage
Camera cards
Full-size SD cards in cameras tend to fail cleanly. The classic cause is an interrupted write: the battery dies or the card is pulled during a burst, so the last images are half written and the directory never got updated. The photos before that point are usually intact. Check the little write-protect switch on the side too, since a card that suddenly appears read-only is often just a switch that slid down in a bag.
Phone cards
microSD cards in phones live a harder life. They handle constant small writes from apps, thumbnails and caches, alongside your photos, so wear and filing-system corruption arrive sooner. There is also a second, more serious possibility on Android.
When you insert a card, Android offers to use it either as portable storage (readable in any card reader) or as internal storage. If it was adopted as internal storage, the card is encrypted and tied to that specific handset. Nobody can read it without that phone and its own key, and that includes us. We do not bypass encryption and no honest laboratory claims to. If the phone still switches on, copy the photos off it first.
Worth saying plainly: iPhones have no card slot. If the photos you are chasing were on an iPhone rather than a card, the route is iPhone data recovery instead.
Counterfeit cards, worn-out cards and broken microSD
Three physical realities account for a large share of the family-photo cases that reach a laboratory.
Counterfeit capacity. Cheap high-capacity cards from marketplace sellers are frequently faked: the card reports 512GB but holds a fraction of that. Once the real capacity is used up, writing wraps around and lands on top of earlier files. The signature is unmistakable once you know it. Last year's photos are garbled or refuse to open while yesterday's look fine. Buy cards from proper retailers, and be suspicious of any card that cost noticeably less than the branded price.
Wear. Flash memory has a finite number of write cycles. A card that has spent two years in a dashcam, an action camera or a home security camera has been written to continuously and is a consumable, not an heirloom. Growing slowness, files that will not open, and a card that suddenly turns read-only are all wear symptoms. Photos you care about should not live on that card as their only copy.
Physical damage. microSD cards snap, crack at the contacts, go through the wash, cook in a car dashboard, and get chewed. Most are monolithic: the memory and controller are moulded into one solid block with no serviceable parts. Getting data out means working at board level in a laboratory to reach the memory directly and read it, purely so the contents can be imaged. You receive your recovered files, not a working card.
What free recovery software can and cannot do
Free tools have a real, narrow use. They scan a card that still reads reliably and rebuild files either from leftover directory entries or by recognising the headers of JPEG, HEIC, MP4 and RAW files. On a card that merely had its index scrambled, that often works.
| Free software has a fair chance when | Stop and use a laboratory when |
|---|---|
| The card mounts every time and reads without errors | The card is not recognised at all, or shows 0 bytes |
| Photos were deleted or the card was quick-formatted | The card gets warm, or scans stall and restart |
| You have a second copy of most of the photos anyway | These are the only copies of a wedding, a newborn or someone who has died |
| You can write recovered files to a different drive | The card is cracked, bent, water-damaged or suspected counterfeit |
What no free tool can do: revive a card whose controller has failed, read a card the computer never sees, undo an overwrite, or open storage encrypted to a phone. Carved files also come back stripped of names, dates and folders, and video in particular often returns truncated.
If you do try, follow two rules. Work from a sector-by-sector image of the card rather than the live card if you have anyone who can make one, and always write the recovered files somewhere else. Run one scan, not six. Our guide to deleted file recovery covers the same ground for drives.
When to stop and hand the card to a laboratory
Hand it over when the card is not recognised, reports zero bytes, keeps demanding a format, is physically damaged or wet, is suspected counterfeit, or when the photos are simply irreplaceable. In that last case the calculation is not technical. One more scan is not worth the risk.
At CBL Data Recovery in Singapore, cards are imaged and worked on in our own laboratory at 6 Harper Road, beside Tai Seng MRT. Nothing is sent overseas, board-level and monolith work is done in our in-house cleanroom, and everything is handled in line with the PDPA, with an NDA available on request. We have been recovering data in Singapore for over 20 years, more than 140,000 recoveries, and are rated 4.9 stars from 909 Google reviews.
How it runs: diagnosis is free, you get a fixed written quote before any work starts, and you see the list of recovered files and confirm it before you pay. Standard cases are no recovery, no fee. Our data recovery cost page explains how quotes are built.
Bring the card in Monday to Friday, 9.30am to 6.30pm, or by appointment at weekends and on public holidays. Call +65 6588 0261, WhatsApp +65 8127 7508, or send the details through the contact form. Tell us what happened just before it failed, and please bring the card exactly as it is.