Data Recovery Software for External Hard Drives
Recovery success depends less on the file name than on what happened after the loss. New writes can reuse deleted space, while formatting, repair tools, TRIM, unstable hardware, and continued recording can reduce what remains recoverable.
Quick answer
Connect the external drive directly, stop all new writes, and select a scan for the actual loss: deleted files, formatting, or a missing partition. Scan before file-system repair or formatting. Recovery is not guaranteed, so prioritize irreplaceable files and verify every restored result.
First Aid: Stop Changes to the Source
- Stop normal use
Do not save, download, install, record, copy, or edit files on the affected storage.
- Cancel repair prompts
Do not format, initialize, create a partition, or run file-system repair before recovery.
- Prepare another destination
Use a different physical drive with enough free space for recovered output.
- Document the loss
Record the device, capacity, original folder, file types, and action that caused the loss.
Choose the Scan by What Happened
| Decision | What to check | Why it matters |
|---|---|---|
| Device identity | Correct capacity, drive letter, and physical device | Select the correct source without modifying it. |
| Connection | Direct port and stable cable or connector | Choose a scan that matches the actual loss. |
| Failure signs | Disconnects, read errors, heat, or abnormal sound | Decide whether software recovery is still safe. |
Choose by what happened: use Deletion Recovery for deleted files, Formatted Drive Recovery after formatting, Lost Partition Recovery for a missing partition, and USB & Memory Card Recovery for removable-media loss. Try Deep Recovery if the initial scan is incomplete.
Scan an external hard drive with GiliSoft Data Recovery
The screenshot below is a real GiliSoft Data Recovery interface for this recovery path.
- Open the matching recovery mode
Choose Deletion Recovery, Formatted Drive Recovery, Lost Partition Recovery, or USB & Memory Card Recovery according to the loss. Do not select by cable type alone.
- Select the exact source
Confirm the physical device, capacity, drive letter, or former partition before scanning.
- Run the initial scan
Keep the source connected and prevent sleep or disconnection while results populate.
- Use Deep Recovery only when needed
Run a deeper scan when the initial result does not contain enough useful files.
- Filter and preview
Narrow results by path, type, size, date, or name, and preview important files when supported.
- Recover to another physical drive
Select the most valuable results first and keep the source unchanged.
Verify Recovered Files Before Reusing the Source
- Open files outside the recovery program
Use the normal document, photo, video, or archive application.
- Check representative content
Inspect the beginning, middle, and end of large documents, videos, and archives.
- Confirm completeness
Compare expected names, folders, dates, file counts, sheets, slides, pages, or media duration.
- Make a second backup
Copy verified irreplaceable files to another safe location.
- Repair or reformat only afterward
Change the original device only after important recovered data has been checked.
Know When Software Recovery Is the Wrong Next Step
Stop scanning when a hard drive clicks, a device repeatedly disconnects, Windows cannot detect the correct capacity, the controller overheats, or the data is important enough that another scan is not worth the risk. Professional recovery may image unstable media with specialized hardware before attempting file extraction.
On SSDs and some flash devices, controller behavior and TRIM can make deleted blocks unavailable quickly. On cameras, drones, and dashcams, new recordings can overwrite old media immediately.
Data Recovery Software for External Hard Drives FAQ
Can every file be recovered from an external hard drive?
No. Results depend on later writes, media type, formatting, TRIM, physical condition, fragmentation, and whether the original data remains readable. No recovery tool can guarantee every file.
Why must recovered files go to another drive?
Writing recovered output to the source can overwrite other deleted data that has not been recovered yet. Use another physical disk with enough free space.
Should I run CHKDSK, format, or initialize the drive first?
Not when important files are still missing. Those actions modify storage structures. Recover and verify important data first, then repair or reformat the device afterward.
What if the device disconnects or makes unusual sounds?
Stop repeated scans. Clicking, unstable detection, severe I/O errors, burning smell, or physical damage requires professional hardware recovery rather than more software attempts.
How do I know a recovered file is usable?
Preview when supported, then open the restored copy in its normal application. For large files, check content throughout rather than only the beginning.