For what is an ARW file, protect the original data first. An ARW file is a Sony RAW image produced by supported Alpha and Cyber-shot cameras. It preserves sensor data and camera metadata for later processing rather than delivering a universally ready-to-share picture like JPEG. Keep the original ARW even after exporting a JPEG or TIFF. If ARW photos vanished from a memory card, stop shooting immediately because every new image can overwrite space that still contains deleted data.
what is an ARW file: safe diagnosis
Sony identifies ARW as its RAW format for supported Alpha and Cyber-shot cameras. Its official explanation distinguishes that format from DNG used by supported Xperia devices; see Sony’s ARW format note. A RAW file usually contains image data before the complete rendering choices that create a normal JPEG. Exposure interpretation, white balance, tone, sharpening, noise reduction, and color rendering can remain adjustable in a compatible developer.
That flexibility has practical costs. ARW files are larger than typical camera JPEGs and may not display in every program. The extension does not promise that an older editor supports a newer camera model. Camera-specific metadata and RAW variations can require an updated codec or application even though both files end in .arw.
A camera can also record ARW and JPEG together. The two files are independent photographs derived from the same capture. Deleting the JPEG does not automatically delete the ARW, and editing one does not update the other. Before cleaning a card, compare filenames, capture times, and both extensions so you do not discard the only RAW original.
Choose the Right Way to Open an ARW File
Use the camera maker’s current software for a compatibility check
Sony’s supported imaging software is a sensible first test when a file from a recent camera will not open elsewhere. Match the software and camera-support list instead of assuming the file is corrupt. Copy one ARW to a healthy local folder for testing and preserve the card unchanged while you investigate.
Use a RAW developer when you need editing control
Current photo applications can interpret many ARW variants and export standard formats. Update the application before diagnosing a new camera’s file as damaged. If one program rejects the image, try another reputable viewer that explicitly supports the camera model. Different results can reveal a codec limitation rather than media damage.
Use an operating-system viewer only for quick inspection
A thumbnail or built-in preview may come from an embedded JPEG rather than a complete decode of the sensor data. Seeing a thumbnail proves that some content is readable, not that every RAW component is intact. Conversely, a missing thumbnail does not by itself prove the photo is lost.
Convert a copy, not the sole original
Export JPEG for sharing, TIFF for a high-quality rendered intermediate, or another format required by the workflow. Keep the ARW as the source. Conversion cannot add sensor information that was discarded, and repeated JPEG saves can introduce further loss. The discussion of the best image file format helps choose an output by purpose.
Copy Camera Files Without Breaking the Evidence
Use a reliable card reader and copy the complete camera folder structure to a dated folder on a healthy disk. Do not move files as the first transfer; copying leaves the source intact until verification. Compare the file count and total size, then open ARW images from the beginning, middle, and end of the shoot. Keep associated JPEG, XML, sidecar, video, and database files until the project is complete. If a transfer was interrupted, follow the same source-protection logic used for recovering lost photo files.
Do not format the card merely because File Explorer cannot show thumbnails. First confirm that the correct reader and application can access it. If Windows asks to format the card, cancel the prompt. A format creates a new file system and can reduce recovery options. Similarly, postpone CHKDSK when unbacked-up photos matter because file-system repair modifies the source.
After confirming two usable copies, eject the card properly. One working folder is not a durable archive. Keep another copy on separate media or protected storage. If the project uses a catalog-based editor, back up both the originals and the catalog; one cannot fully replace the other.
Decide Whether the Problem Is Compatibility, Corruption, or Loss
| What you observe | Likely direction | Best next check |
|---|---|---|
| ARW opens in one current app but not another | Application or camera-model support | Check the program’s supported-camera list |
| Thumbnail appears, but full image fails | Partial damage or incomplete RAW decoding | Test a copied file in another compatible developer |
| Many files fail after unsafe removal | Card or file-system trouble | Stop writes and image or recover the stable card |
| Files disappeared after deletion or format | Logical data loss | Stop shooting and scan the original card |
| Card disconnects or reports changing capacity | Possible physical instability | Stop DIY scans and consult a specialist |
Test copies rather than modifying originals. Renaming an arbitrary damaged file to .jpg does not convert it. It only changes the label Windows uses to choose an application. A genuine conversion requires software that successfully decodes the source and writes a new file.
Zero-byte files contain no payload for ordinary repair. A normal-size ARW that fails everywhere may be incomplete or damaged, but file repair and file recovery are different tasks. Recovery retrieves another copy from storage; it does not necessarily reconstruct a damaged RAW stream.
Recover Deleted ARW Photos From a Stable Card or Drive
Drecov is Windows data recovery software for photos and other files on PCs, hard drives, SSDs, external drives, USB devices, SD cards, and memory cards. Its read-only recovery mode, SD Card Recovery, Quick Scan, Deep Scan, filters, preview, and separate-destination recovery are relevant when ARW originals were deleted, lost after a quick format, or became inaccessible through logical damage. Lost Partition Recovery can address a missing partition entry. It cannot repair a physically failing card or guarantee overwritten photos.
⚠ Warning: Install it on a drive different from the one where your data was lost to prevent overwriting.
This check is especially useful for what is an ARW file. Remove the card from the camera and engage its lock tab if available. The tab is a handling aid, not complete write protection in every reader. Do not take another photo, initialize the card, or install software on the source. Prepare a healthy disk with enough room for recovered originals.
Step 1: Open Drecov and select the original photo location
It helps diagnose what is an ARW file without changing the source data. Connect the stable card through a reliable reader. Open Drecov and choose SD Card Recovery or the original volume. If a drive partition rather than a camera card disappeared, select the relevant Lost Partition Recovery workflow. Confirm capacity so you do not scan the wrong device.
Step 2: Start Quick Scan
Run Quick Scan and browse the camera folders. Look for the expected date range, filename sequence, dimensions, and plausible file sizes. The deleted-photo recovery methods provide broader context for other photo formats.
Step 3: Continue with Deep Scan only if the card is stable
Use Deep Scan when Quick Scan misses the target session and the connection remains reliable. Stop if reads become erratic or the device repeatedly vanishes. Additional direct scans can worsen a failing medium; imaging or professional help is safer for valuable work.
Step 4: Filter and preview representative ARW candidates
Filter by photo type, former path, name, size, or date where available. Preview several candidates when Drecov supports the specific ARW variant. Preview support can differ by camera model, so lack of preview is not automatic proof of failure. Select based on multiple clues and retain uncertain candidates for later testing.
Step 5: Recover to another healthy device
Save selected files to the prepared disk, never to the camera card. If output is not in the expected folder, check the Drecov Folder or Recovery Folder. Writing recovered files back to the card can overwrite other images that have not yet been copied.
⚠ Warning: Install it on a drive different from the one where your data was lost to prevent overwriting.
Step 6: Validate the photos before reusing the card
Open recovered ARW files in a current compatible developer. Inspect full-resolution rendering, metadata, and images from several points in the shoot. Keep the source unchanged until the destination is backed up. The Drecov homepage provides the product entry point.
Five ARW Questions Worth Settling
Is ARW better than JPEG?
ARW retains more editing latitude, while JPEG is smaller and easier to share. The better format depends on whether you need a camera original or a finished deliverable.
Can Windows open every ARW file?
No. Support depends on the codec, application, and camera model. Test a current compatible program before calling the file corrupt.
Should I convert ARW to DNG?
DNG can suit some archives, but conversion is a workflow choice. Preserve the original ARW and validate converted copies before relying on them.
Why is the ARW much larger than its JPEG?
The RAW file retains sensor data and metadata used for later rendering. JPEG applies processing and compression to produce a smaller finished image.
Can a deleted ARW be recovered after more photos were taken?
Possibly, but new captures may overwrite deleted space. Stop using the card immediately. Recovery cannot restore data that has been fully overwritten.
Conclusion
An ARW is valuable because it preserves the Sony camera’s RAW capture for later decisions. Open it with software that supports the exact camera, transfer it by copying, and retain the original beside verified exports. When ARW photos are deleted, stop card use and let Drecov scan the stable original location, then recover to another disk and validate in a real RAW developer. That workflow protects both the photograph and the evidence needed to judge it.
⚠ Warning: Install it on a drive different from the one where your data was lost to prevent overwriting.
