Your SD card is corrupted — are the files really gone?
Short answer: Almost certainly not. “Corrupted” almost always means the FAT32 or exFAT file system (the directory that maps file names to storage locations) has become damaged — not that the underlying data has been erased. The files are still physically stored in the card’s NAND flash memory cells. Three tools, used in the right order, recover the majority of corrupted SD card cases without professional help and without spending anything.
How to recover from a corrupted SD card
Step 1 — chkdsk: free file system repair (Windows)
Connect the SD card to a Windows PC via a USB card reader. Open Command Prompt as administrator (right-click the Start button → Terminal (Admin)). Type: chkdsk X: /f /r replacing X with your SD card’s drive letter. The /f flag fixes file system errors; the /r flag locates bad sectors and attempts to recover readable data. This can take 10–30 minutes for large cards. If chkdsk succeeds, your files should reappear in File Explorer. If it reports the card is “RAW” (a file system type that means “unrecognised”) or says it cannot run, move to Step 2.
Step 2 — Recuva for file recovery
Download Recuva (free from piriform.com) and run it with the SD card as the scan location. Select “Pictures” as the file type for photo recovery, or “All files” for documents and videos as well. Recuva scans below the file system and locates files by their directory entries, even when the file system is damaged. It shows a red/yellow/green condition indicator for each recoverable file. Recover green and yellow files first — these have the highest chance of being complete. Save them to a different drive, never back to the SD card. This guide covers photos and documents for a corrupted card the same way our companion guide on recovering photos from a damaged SD card covers the physically-damaged scenario.
Step 3 — PhotoRec for deeper recovery
If Recuva recovers partial files or misses content, escalate to PhotoRec (free, part of TestDisk at cgsecurity.org). PhotoRec ignores the file system entirely and scans sector by sector for known file signatures — JPEG headers, MP4 frames, Word document magic bytes. It recovers files even when the entire file system is overwritten or unreadable. The trade-off is that file names and folder structure are lost — you get sequentially numbered files. For video and photo recovery from a smartphone card, this is usually acceptable. Always scan from a disk image of the card (created with dd or Win32DiskImager) rather than the original, to protect against further deterioration during scanning.
Step 4 — The India angle: smartphone dependency and counterfeit cards
Indians are disproportionately dependent on SD cards compared to most other markets. Budget Android phones (a dominant segment in India) often have limited internal storage, and users store everything — family photos, Aadhaar scans, WhatsApp backups, financial documents — on a single external SD card. When that card fails, the loss is severe. The added risk in India is counterfeit SD cards: fake SanDisk and Samsung cards are widely sold at local mobile shops and online marketplaces. These cards contain low-grade NAND flash with fraudulently inflated capacity reporting, and they fail far faster than genuine cards — sometimes within months of first use. If you bought a 64 GB or 128 GB card for significantly less than market price, verify it with H2testw (Windows) or F3 (Linux/Mac) before trusting important data to it.
Cost and when to call a professional
When DIY ends
Call a professional if: the SD card is not detected at all by any computer or card reader; the card is physically damaged (bent contacts, cracked body, heat damage from a charging fault); PhotoRec returns zero recoverable files; or the card was inside a device that had a liquid or electrical fault.
Typical recovery cost in India
Software-based recovery (file system corruption): free with chkdsk/Recuva, or ₹500–₹1,500 at a service centre. Controller-level repair (card not detected): ₹2,000–₹5,000. Chip-off cleanroom recovery for physically damaged cards: ₹8,000–₹25,000. Our data recovery service covers all three levels with transparent pricing before any work begins.
A note from the LRW Engineer Team
The most expensive mistake we see with corrupted SD cards is a user following online advice to "format and reuse the card" after a corruption error. Formatting doesn’t fix a failing card — it just hides the symptoms temporarily while overwriting the data. If the card is showing errors, it is signalling hardware degradation. Back up anything you can recover, then retire the card. SD cards are not designed for indefinite use — they have a limited number of write cycles, and Indian conditions (heat, humidity, power instability) accelerate that degradation.