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Deleted Files on an SD Card or USB Stick: Why FAT32 and exFAT Recovery Works Differently

October 14, 2026 · DiskRescue Blog

You deleted a folder from a USB stick, went to the Recycle Bin to pull it back, and it isn't there. Or you cleared photos on a camera's SD card, plugged the card into your PC, and found nothing to restore. Most guides you'll find next talk about NTFS, the file system on your laptop's internal drive. Memory cards and flash drives usually aren't NTFS, and that difference decides what comes back and what it looks like when it does.

Short version: Windows doesn't keep a Recycle Bin for most removable drives, so deletion there is immediate. Cards and sticks are usually FAT32 or exFAT, where deleting a file breaks the map of where its pieces were stored. Signature scanning still finds the contents, but the file names and folder layout typically don't come back with it. Stop writing to the drive, check your phone or camera's own trash first, then scan.

Removable drives skip the Recycle Bin

On your internal drive, Delete moves a file to the Recycle Bin and you get a second chance. On a USB flash drive or a memory card in a reader, Windows treats the media as removable, and Delete removes the file right away. The confirmation dialog says so if you read it closely: the file will be permanently deleted. Many people find out only when they go looking in the Recycle Bin and come up empty.

Before you scan anything, check the device the photos came from. Phone gallery apps commonly keep deleted items in their own trash or "Recently deleted" album for about 30 days, even when the photos lived on an SD card. If they're still there, restoring from the app is faster and brings back everything, names and dates included. Until you've finished, don't take new photos or videos with that card in the phone.

Find out what format the drive uses

Right-click the drive in File Explorer, choose Properties, and look at the File system line on the General tab. You'll most likely see one of three things:

• FAT32 — common on SD cards up to 32 GB and on older or smaller USB sticks.
• exFAT — the standard for SD cards of 64 GB and up, and on many larger flash drives and some external drives sold for use with both Windows and Mac.
• NTFS — typical for internal drives and many external hard drives formatted on Windows.

If the drive won't open at all and Windows wants to format it, you won't see a file system here. That's a different problem, covered in the "you need to format the disk" error.

What deletion erases on FAT32 and exFAT

Every file system keeps two kinds of information: the contents of each file, and an index that says which file is called what, which folder it lives in, and where its pieces sit on the drive. Deleting a file almost never touches the contents. It edits the index.

What makes FAT32 and exFAT different from NTFS is how much of the index survives. On FAT32, a file stored in several separate pieces depends on a chain in the file allocation table that links one piece to the next, and deleting the file typically clears that chain. exFAT tracks free space in a separate allocation bitmap and doesn't necessarily erase the chain, but once the space is marked free there's nothing stopping new data from landing in it. On both, the directory entry is flagged as deleted and keeps a few clues, including where the first piece started. A file stored in one unbroken run can sometimes be rebuilt from those clues. A fragmented one is much harder to reassemble reliably.

NTFS keeps a richer record for each file, and that record often survives deletion intact until it's reused. That's why name-preserving recovery is most dependable on NTFS, and why results on cards and sticks look different.

What actually comes back

Some tools try to rebuild files from those leftover directory entries, which can work for files stored in one piece. DiskRescue's name-preserving mode reads NTFS records only, so on FAT32 and exFAT it uses a signature scan: reading the whole drive from start to finish and looking for the byte patterns that mark the start of a JPEG, an MP4, a PDF, a Word file. When one is found, the file is cut out from there and saved.

That approach comes with a clear trade-off. It doesn't need the index, so it works no matter what happened to the directory. But file names and folders only ever existed in the index, so recovered files get generic names, and folders are replaced by groupings by type. Photos are usually stored in one piece and come back well. Long videos are more likely to have been split up on the card, so some will come out incomplete; why recovered video files won't play explains that pattern. If you end up with thousands of numbered files, sorting recovered files with no names shows how to rebuild order from the dates stored inside photos.

What to avoid until the files are out

Deleted contents sit in space the drive now considers free. Anything written to the drive can land on top of them.

• Don't copy anything onto the drive, including the recovered files. Save them to your computer's internal drive or a different external drive.
• Leave the card out of the camera. Cameras create folders and index files when they power up with a card inside.
• Don't run Scan and repair. It reorganizes the file system and can turn recoverable leftovers into anonymous .CHK files; what scan and repair does covers it.
• Don't reformat to make the drive look clean. A full format on Windows Vista and later writes zeros across the whole volume, and after that nothing remains to recover.

Running the scan with DiskRescue

Install DiskRescue on your computer, connect the card or stick, and select it in the list. Choose Recover now and set the save location to a different drive; if you pick the same disk you're recovering from, DiskRescue stops and asks for another one. While the scan runs, the number of photos, videos and documents found climbs in real time. Results are sorted into separate folders by type. The folder names are currently in Korean: 사진 (photos), 동영상 (videos), 문서 (documents) and 기타 (other).

DiskRescue's Restore deleted files mode, the one that brings back original names and folder paths, reads NTFS records, so it applies to NTFS drives. On FAT32 and exFAT media, Recover now is the right choice.

The free trial saves the first 20 files the scan finds, with no size limit, and there's no sign-up or social sharing step. Open them from the other drive. They show you what condition the card's data is in, though each recovered file still needs its own check.

When a scan won't help

If the card was formatted with a full format, or used heavily after the deletion, some or all of the contents may have been overwritten, and overwritten data can't be read back by any software. And if the drive stops showing up, disconnects mid-scan, or reports its capacity as zero, the problem is the device rather than the file system. In that case, start with what to do when a USB drive shows no files or the SD card recovery guide before scanning again.

How DiskRescue Compares

On a lifetime license, DiskRescue costs about 1/5 what the big-name recovery suites below charge — paid once and used for life, with no auto-renewal.

Prices, features, and free-tier limits checked on each official site (Windows editions) on July 14, 2026 — they may change with sales or updates. The price comparison uses DiskRescue's launch price ($29.99). EaseUS free recovery is 500 MB by default, expanding to 2 GB after a social-media share (kb.easeus.com); Disk Drill's official free limit is 100 MB (cleverfiles.com).

Further reading

• Recovered Files Named 0x00003a1c8000.jpg? Why the Names Are Gone and How to Sort Them
• Windows Wants to Scan and Repair Your Drive. Here's What That Does to Your Files.
• Why Your Recovered Video Files Won't Play