How to Handle Missing Files After a USB Transfer Stops

Updated on Oct 17, 2026 | by Qiling

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Separate Copy Failures From Data Loss
Before You Scan
Scan the Device That Lost Its Files
Retry With a Verified Copy
Frequently Asked Questions

Unplugging a USB drive during a transfer can leave a mixture of complete, incomplete, and untouched files. The safest first action is to compare source and destination without changing either.

Separate Copy Failures From Data Loss

If the operation was Copy, the original files should normally remain on the source. If it was Move, some originals may have been removed after their destination copies were written.

Check whether the USB device still appears at its expected capacity. If it repeatedly disconnects or shows read errors, additional scanning can stress a failing drive.

Before You Scan

Do not rerun the same transfer into the same destination folder yet; it may overwrite partial evidence. Save intact copies to a third device.

Write down which direction the transfer was going and whether you selected Copy or Move. That determines which physical disk should be scanned if files are absent.

Scan the Device That Lost Its Files

Qiling Deep Data Recovery can scan an accessible Windows drive for files that are no longer visible. The steps below use the mode that fits this case; scan results are possibilities, not a guarantee of intact recovery.

Step 1. Inventory Both Sides

Compare source and destination by folder, filename, and size. Open representative files to distinguish complete copies from placeholders.

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Step 2. Choose USB/SD Scan

If the missing originals were on a USB stick or card, choose USB/SD Scan. For files deleted from an internal Windows disk, start with Fast Scan instead.

Step 3. Choose the Former Source

Select the device that held the missing files before the transfer, checking its capacity. Keep the connection stable during the scan.

Step 4. Inspect High-Value Results

Filter by the missing file types and preview what you can. Prioritize files absent from both locations rather than duplicating intact copies.

Step 5. Recover to a Third Disk

Click Recover for needed files and save to another physical disk. Check that the copies open before removing any partial transfers.

Retry With a Verified Copy

Once essential files are safe, retry as Copy and verify the destination. Avoid removing the USB device until the transfer and safe-eject process complete.

If transfer failures recur with the same device or cable, stop using it as the only copy and test the connection or replace the device.

Frequently Asked Questions

Can an interrupted Copy delete the originals?

Usually the source remains, but check it directly; device errors can cause a separate access problem.

Why are some destination files zero bytes?

They may be incomplete placeholders from the interrupted transfer. Compare with source copies.

Should I run a repair command immediately?

Recover important data first if the USB file system is now unreadable.