Dati della scheda SD scomparsi? Guida pratica al recupero dei dati della scheda SD

Path A — Accidental deletion & accidental formatting

Symptoms: Files/folders vanished but card is readable

Immediate steps (must do before recovery):

1.Stop using the SD card immediately. Any write may overwrite recoverable data.

2.Use trustworthy SD card data recovery software like Magic Data Recovery that supports quick and advanced scans. These tools scan the file allocation table and perform file carving (signature-based recovery) to list recoverable files.

Perché funziona: Deletion and most quick formats generally only mark clusters as free or remove directory references. The file content usually remains until overwritten.

Path B — File directory errors (disappeared files or garbled names)

Symptoms: Files/folders disappear intermittently; file and folder names become garbled (weird characters)

What is happening: The directory entries manage the file names, sizes and location on the volume. If the directory entries are wiped or corrupted, the SD card is unable to show the files or it just shows garbled files.

Why standard recovery software sometimes fails: Recovery tools focus on deleted/formatted scenarios and file carving. When directory structures are partially corrupted (and filenames/attributes preserved in unusual locations), a low-level hex/disk editor can inspect and repair directory entries or extract files precisely.

WinHex solution — guidelines (for advanced users or professionals):

Attenzione: WinHex (or any sector-level editor) can change raw disk structures. Always work on an image, not the original card. If you’re not experienced with hex/disk editors, consider professional help.

Step-by-step (high-level):

1. Open the SD card volume in WinHex (or a similar low-level disk editor).

2. Locate the partition start and the file system structures — for FAT32/exFAT that means examining the Boot Sector, FAT table area and directory entry. In this case, we can see the subfolder in “DCIM” contains strange characters, and the starting sector is garbled. However, the next sector contains the correct information for a directory entry. We can assume the issue is that the correct sector location is offset by one sector.