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How to Recover Data from External Hard Disk Which is Not Detecting in 4 Steps
Struggling with an undetected external hard disk (WD, Seagate)? Discover proven methods to recover data from external hard disk which is not detecting. Learn how to troubleshoot connection issues, use free recovery software, and repair undetected drives without losing files.
By Delores / Updated on August 4, 2026
How to Recover Data from External Hard Disk Which is not Detecting
How to extract data from external hard drive that cannot be detected when connected to computers?
Hey friends,
I have a Seagate 1TB external hard drive that has a bunch of raw video footage that I need to access. There was nothing wrong with the hard drive prior, and it has been in storage for a while. Today, when I attempted to access the hard drive, no computer could detect it when connected.
When plugged into a computer, the hard drive lights up as if it's been plugged in. This indicates that the cord works and is receiving power from my PC, but my PC cannot pull the data.
What kind of software or tools should I look into to extract the data?
Any guidance would be greatly appreciated!
- Question from reddit.com
Your external hard drive may spin up and show a light, yet Windows acts as if nothing is connected. Before you format, initialize, or run CHKDSK, determine exactly where Windows stops detecting the drive. The safest order is triage → recover → repair.
Quick Answer for Recovering HDD Not Detected
If your external hard drive is not detected, first test the USB cable, power, port, and another computer.
Then check Disk Management, Device Manager, and DiskPart. If the disk appears as RAW, Unallocated, Not Initialized, Offline, or without a drive letter, your files may still be recoverable. Recover important data before formatting, initializing, partitioning, or running repair commands.
If the drive clicks, grinds, beeps, repeatedly spins up and down, or remains absent from multiple computers, stop repeated testing and consider professional recovery.
Key Points Before Recovering
- Recover first, repair second. CHKDSK, initialization, partition creation, and formatting can modify disk structures needed for recovery.
- Disk Management is a key checkpoint. RAW, Unallocated, Not Initialized, Offline, and missing-drive-letter states require different actions.
- Mechanical symptoms are a stop signal. Clicking, grinding, beeping, and repeated spin-up/down can indicate hardware failure. If you hear these, disconnect the drive. These symptoms can indicate mechanical or electrical failure. Repeated power cycles can make an unstable drive harder to recover.
- Never recover to the same physical disk. Use a separate destination.
- Do not accept a format prompt blindly. RAW or foreign file systems may still contain recoverable data.
What Does Windows See When External Hard Drive Not Detected?
The external hard drive being "not detected" can mean several different things.
- The drive might be missing only from File Explorer;
- Visible in Disk Management as RAW;
- Listed as Unallocated;
- Or completely absent from Windows.
The correct recovery method depends on which situation you have.
Open Disk Management with Win + X → Disk Management, or press Win + R, enter diskmgmt.msc, and press Enter. Locate the external disk by capacity and status.
| What you see | What it may mean | Data risk | Recommended next step |
|---|---|---|---|
| Healthy NTFS/exFAT but no drive letter | Volume is recognized but not exposed in File Explorer. | Low | Check whether assigning a letter restores access; recover first if unstable. |
| RAW | Windows cannot identify a usable file system. | Medium | Do not format. Recover data first. |
| Unallocated | Partition information may be missing or damaged. | Medium | Do not create a New Simple Volume. Try partition recovery. |
| Unknown, Not Initialized | Windows cannot read a valid partition table; enclosure or disk problems are possible. | High | Do not initialize if data matters. Test connection and recover first. |
| Offline | Windows has taken the disk offline. | Medium | Investigate why before bringing it online. |
| Device Manager only | Driver, controller, enclosure, or storage-stack problem. | Medium | Check drivers, ports, power, and another computer. |
| DiskPart only | Windows may still see the physical disk even if the GUI does not render it. | Medium | Inspect only; never use destructive commands during recovery. |
| Nowhere on multiple computers | Possible cable, power, enclosure, bridge, PCB, firmware, or mechanical failure. | High | Rule out cable/power once, then consider professional recovery. |
| Wrong capacity | Possible firmware, bridge, controller, or hardware issue. | High | Stop repeated scans if data is critical. |
Why the External Hard Drive is Not Detecting by Windows?
An external hard drive may fail to be detected by Windows due to a combination of hardware, software, or configuration issues. Common causes range from faulty connections and driver conflicts to file system corruption. Below is a detailed breakdown of the key reasons:
⭕ Insufficient Power Supply: High-capacity drives (e.g., 3.5" HDDs) may require external power. USB ports on laptops or hubs often fail to deliver enough power.
⭕ Physical Damage: Drops, water exposure, or PCB (circuit board) failure can render the drive undetectable.
⭕ Outdated/Corrupted Drivers: Obsolete or corrupted USB or disk drivers can cause recognition failures.
⭕ Missing/Conflicting Drive Letter: Windows may fail to assign a drive letter automatically, or conflicts with existing letters can hide the drive.
⭕ Uninitialized/Unallocated Drive: New drives or drives with deleted partitions appear as "Unallocated" in Disk Management and require initialization. Drive visible in Disk Management but missing a drive letter.
⭕ Corrupted File System: Improper ejection, malware, or bad sectors can corrupt the file system, marking the drive as “RAW”.
5 Things You Should Not Do Before Recovering
1. Do not click “Format disk”. Formatting changes file-system structures and can complicate recovery.
2. Do not run CHKDSK first. CHKDSK repairs file-system structures; it is not a dedicated recovery tool.
3. Do not click “Initialize Disk”. Initialization writes new partition metadata.
4. Do not repeatedly power-cycle a drive with mechanical symptoms.
5. Do not install recovery software on the affected disk or recover files back onto it.
How to Recover Data from External Hard Disk Which is Not Detected?
If Windows can still communicate with the external drive, even when it is RAW, Unallocated, or Not Initialized, recovery software may be able to read accessible sectors without relying on the damaged file-system structure.
So, the priority is to recover data from the external hard disk which is not decting by a professional file recovery program, like MyRecover.
- It is a FREE data recovery tool with the highest recovery rate, 99%.
- It can help you to recover deleted or lost files from any type of HDD, SSD, USB, SD card, camera, and so on, as you need (500+ devices).
- Besides, no matter whether you want to recover photos, videos, docs, archives, emails, compressed files, or other files, it gets all covered (1000+ formats).
- You can recover up to 500MB of files for free on Windows PCs and Servers.
To recover data from WD, Seagate, or other brands of external hard drives that are not detecting with MyRecover, take the following steps:
Step 1. Connect your WD, Seagate, or other brands of external hard drive. Then download, install, and run MyRecover.
100% SecureStep 2. Tap Disk Data Recovery, choose the target external hard drive, and click on "Scan". If you cannot find the external hard drive, switch to “Partition Lost Recovery” under the "Advanced Recovery". It will scan your operating system for the lost or missing partitions.
Step 3. Once scanned, all missing files are found and listed, tick what you need and click on "Recover".
Step 4. Choose a different drive than the original external hard drive to save the recovered files.
Wait for a while, the recovery process will be finished. If you are restoring a large amount of data, the time will be longer.
- Notes:✎...
- For unlimited file recovery, you can upgrade to MyRecover Professional to enjoy it; then you can use more advanced features, like recovering files from a crashed computer, etc.
- You can also preview files before recovery after upgrading, which is useful to find the files you need instead of recovering everything.
MyRecover- Recover Deleted Files Easily with Simple Clicks
- 1000+ File Formats Supported
- Support HDD, SSD, External Hard Drive, USB Drive, SD Card, etc.
- Quickly Find Files Using File Types, Name, Size, etc.
100% SecureHow to Repair Undetected External Hard Drive After Data Recovery | 8 Ways
Only proceed once important files have been recovered and verified.
Way 1. Check the cable, USB port, or Another Computer
Swap the USB cable using one that is working well, try different USB ports, avoiding hubs and using rear ports on desktops, and test the drive on another computer to rule out PC-specific issues.
Way 2. Verify Power Supply
If your external hard drive is 3.5", please ensure it has an external power adapter, which is plugged in and functional. If you are using laptops, you can employ a Y-cable (dual-USB) to draw extra power if needed.
Way 3. Update/Reinstall Drivers
1. Open "Device Manager" by pressing Win+ X key on your keyboard and selecting "Device Manager" from the menu.
2. Expand "Disk Drives", right-click the external drive, and select "Update Driver" which will automatically search for drivers.
3. If the drive is listed as "Unknown Device," you can click "Uninstall Device" instead, then restart your PC and reconnect the drive.
Way 4. Assign a Drive letter
If you can see the external hard drive in Disk Management but it is not visible in Windows File Explorer, please check if it has a drive letter. If not, you have to assign it with an available drive letter, and then you will see it in your Windows File Explorer.
To assign it a drive letter, just right-click it, choose “Change Drive Letter and Paths”, select an available letter from the given options.
Way 5. Rescan Disks
Sometimes, you need to rescan disks to show the undetected external hard drive. To do this:
1. Right-click the Start icon, and choose Disk Management.
2. Tap Action > Rescan Disks.
3. It will refresh Windows' view of connected storage, which might show the external hard drives.
Way 6. Make Your Offline External Hard Drive Online
If the disk is explicitly Offline and otherwise healthy, you may be able to bring it online. If it became offline after a crash or hardware event, investigate the underlying cause first.
Here is how to bring your external hard drive online:
1. Connect your external hard drive to your computer.
2. Right-click Start, then choose Disk Management.
3. Find your drive; it will say "Offline".
4. Right-click the disk name (grey area on left), select Online.
Way 7. Repair File System by CHKDSK
A corrupted file system or bad sector will also probably make the external hard drive undetected by the operating system. To fix that, you need to run CHKDSK tool.
1. Open Command Prompt as Admin.
2. Input the following command and press on Enter:
chkdsk g: /f /r
Replace g with the drive letter (skip if the drive has no letter).
Way 8. Initialize and Format Disk
Only do this after verifying that recovered files are complete and usable, or when the disk is confirmed to contain no needed data. Initialize the disk only when initialization is genuinely required.
1. Right-click the Start button, select Disk Management.
2. Find your disk labeled "Not Initialized" (black bar, no partitions). Right-click the disk name (e.g., "Disk 1"), select Initialize Disk.
3. Choose a partition style: GPT (recommended for most drives — supports large drives, more reliable), or MBR (use only if you need compatibility with very old systems), and click OK.
4. The drive now shows as "Unallocated" (ready to format). Right-click the Unallocated space, select New Simple Volume, and hit Next.
5. Assign a drive letter (e.g., D: or E:), click Next.
6. Choose file system, allocation unit size, and volume label, etc. Tick "Perform a quick format" (faster than full format), click Next > Finish.
The drive will now appear in File Explorer, ready to use.
Mac-formatted drives, Linux drives, and BitLocker
- APFS or HFS+: Windows may show a Mac-formatted drive as RAW or unformatted. Do not accept a format prompt if you need the data. Use the original Mac or compatible software.
- ext4: Linux file systems may not be natively readable in Windows. Use an appropriate Linux environment or compatible software.
- BitLocker: Encrypted volumes require the correct recovery credentials. Keep the BitLocker recovery key available.
- Large disks and partition schemes: Recover data before changing partition schemes or converting between MBR and GPT.
FAQs About Recovering Data from An Undetected External Hard Drive
Can I recover data from an external hard drive that is not detected at all?
Recovery software generally needs Windows to detect the physical device somewhere in the storage stack. If the drive appears in Disk Management, Device Manager, or DiskPart, software recovery may be possible. If it is absent from multiple tools and computers, investigate cable, power, enclosure, bridge, firmware, and hardware causes before considering professional recovery.
Should I run CHKDSK before recovering data?
No. CHKDSK is a file-system repair utility, not a dedicated data recovery tool. Recover important data first.
Should I initialize a disk that says Not Initialized?
Not if it contains important data. Recover or clone important data first.
Should I format a RAW external hard drive?
No, not if you need the files. Recover the data first, then format after verification.
Why is the drive visible in Disk Management but not File Explorer?
Common causes include a missing drive letter, RAW or unsupported file system, offline status, or partition damage.
What should I do if my external hard drive clicks or beeps?
Stop repeated power cycling and seek professional recovery if the data is important. These symptoms can indicate mechanical failure.
Why does my external hard drive work on another computer but not mine?
This usually points toward a host-side issue such as a USB controller driver, drive-letter conflict, power management, or insufficient power. Test another cable, direct USB port, and second computer.
Can I recover data from a WD My Passport that is not detected?
Often yes, but WD My Passport models may use hardware encryption and integrated USB bridge designs. Keep the original enclosure when appropriate and avoid assuming that removing the disk and connecting it directly by SATA is safe for every model.
How long does scanning an external hard drive take?
It depends on capacity, connection speed, scan method, and drive condition. A deep scan of a large or unstable drive can take substantially longer than a quick scan.
How much does professional data recovery cost?
The source article gives example ranges from several hundred dollars for logical issues to several thousand dollars for severe mechanical or platter damage. Actual prices vary by device, failure type, laboratory, parts, and procedures.
The bottom line
If your external hard drive is not detected by computer, you can try the above fixes. Prioritize data recovery before attempting risky repairs like formatting or initializing. Tools like MyRecover can rescue files even from RAW or unallocated drives, ensuring your critical data isn’t lost forever. No matter you want to recover data from WD, Seagate, Samsung, SanDisk external hard drive which is detecting, MyRecover is a nice choice.
The most important principle is sequence: triage the drive, recover your important data, verify the recovered files, and only then repair or reformat the original disk.
If the drive has mechanical symptoms or remains completely invisible across multiple known-good systems, stop repeated testing and seek professional help.
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