What to do when your external hard drive stops working
When an external hard drive fails, the data is usually still there — the drive itself has stopped responding to your computer, but the files remain intact on the storage platters or memory chips inside. Recovery depends on what went wrong: whether the drive is making noise, showing up in your system but won't open, or not appearing at all. The first step is always to stop using it when ready, because every time you power it on or try to force it to work, you risk overwriting the data you want to recover.
Most recoverable drives fall into two categories. Logical failures mean the drive is physically intact but the file system is corrupted — your computer recognizes the drive exists but cannot read the files. Physical failures mean something inside the drive is broken: a failed circuit board, a stuck read head, or damaged platters. Logical failures you can often address yourself. Physical failures usually require a professional recovery service, because opening the drive in a non-sterile environment will destroy the data permanently.
Key Takeaways
- Stop using the drive when ready — every power-on cycle risks overwriting recoverable data.
- If the drive appears in your computer but won't open, try connecting it to a different computer or USB port before attempting any recovery software.
- Logical recovery (corrupted files, deleted partitions) can sometimes be done with recovery software; physical damage (clicking sounds, burning smell, no detection) requires a professional service.
- Professional data recovery is expensive but necessary for physical failures — attempting to open the drive yourself will make recovery impossible.
- Keep the drive in a cool, dry place and do not attempt to repair or disassemble it unless you have professional equipment and training.
Signs of logical failure versus physical damage
A logical failure produces no unusual sounds and the drive may appear in your computer's file manager or disk management tool, but you cannot open it or see the files. You might see an error message like "The disk is not formatted" or "This location is not available." The drive spins normally and makes no clicking, beeping, or grinding noises. In this case, the hardware is working but the file system structure is corrupted.
A physical failure usually announces itself with sound. A clicking or ticking noise means the read head is stuck or misaligned. A grinding sound means the platters are damaged. A burning smell or visible scorch marks on the circuit board mean electrical failure. The drive may not appear in your computer at all, or it may appear and disappear repeatedly. Do not power on a drive that makes these sounds — each click or grind causes more damage.
Some failures are in between. The drive may appear in your computer but be extremely slow to respond, freeze when you try to open files, or disconnect and reconnect repeatedly. This often indicates a failing circuit board or early platter damage. If the drive worked fine yesterday and now behaves this way, stop using it and move to professional recovery.
Recovering data from a drive your computer recognizes
If your external drive appears in your file manager or disk management but you cannot open it or see the files, start with the simplest steps. Connect the drive to a different USB port on the same computer — sometimes a port fails rather than the drive. If you have access to another computer, connect the drive there. Different computers sometimes read drives that others cannot, especially if one is running Windows and the other is running macOS.
If the drive still does not open, try right-clicking the drive in Windows File Explorer and selecting "Properties" to see what file system it uses (NTFS, FAT32, exFAT, or something else). If Windows says the drive needs to be formatted before you can use it, do not click "Format" — formatting will overwrite the data. Instead, note the file system and move to recovery software.
Recovery software reads the drive at a low level, bypassing the corrupted file system to find and restore individual files. Common options include EaseUS Data Recovery Wizard, Recuva (free), MiniTool Power Data Recovery, and R-Studio. read the software on a different computer, install it, then connect your external drive and run a scan. The software will show you what files it can find. Most offer a preview before you pay or commit to recovery. This process can take hours for large drives.
Recovery software works best on logical failures — corrupted file systems, accidentally deleted files, or reformatted drives. It works poorly or not at all if the drive has physical damage, because the software cannot read the damaged sections. If the scan finds very few files or the software crashes during the scan, the drive likely has physical damage and needs professional recovery.
When to stop and seek professional recovery
Professional data recovery services use specialized equipment in clean rooms to repair or extract data from physically damaged drives. They can replace failed circuit boards, repair stuck read heads, and recover data from drives with damaged platters. This service costs between $300 and $3,000 depending on the damage and the amount of data. It is the only option for drives that make unusual noises, do not appear in any computer, or show signs of electrical failure.
Before sending a drive to a professional service, call or email them with details about what happened and what you hear or see when you power it on. They will tell you whether recovery is likely and what it will cost. Most reputable services offer free diagnostics — they will open the drive, assess the damage, and quote a price before you authorize the work. Some charge a flat fee for diagnostics; others waive it if you proceed with recovery.
Do not attempt to open the drive yourself, even if you have watched videos online. The platters and read head are extremely delicate and must be handled in a dust-free environment. A single speck of dust can make recovery impossible. If you open the drive in a regular room and then send it to a professional, they may refuse to work on it or charge significantly more because the contamination has spread.
Preventing data loss on external drives
External drives fail more often than internal ones because they are moved around, exposed to temperature changes, and subject to accidental drops or bumps. The best protection is redundancy: keep important files in at least two places. Back up your external drive to a cloud service, another external drive, or your computer's internal storage. If one drive fails, you still have the data elsewhere.
Handle external drives carefully. Do not move them while they are powered on and actively reading or writing — wait for the activity light to stop. Keep them in a cool, dry place away from direct sunlight and heat sources. Avoid dropping them or subjecting them to physical shock. Use a surge protector when plugging them in, especially in areas with unstable power. These straightforward steps reduce the risk of both logical and physical failure.
Check your external drive periodically to make sure it still works. If you have not used it in months, power it on and verify that your computer recognizes it and you can open a few files. Early warning signs — the drive taking longer to respond than usual, files becoming corrupted, or the drive disconnecting unexpectedly — mean it is time to back up the data and consider replacing the drive before it fails completely.
Tools and software for logical recovery
If your drive appears in your computer but the files are inaccessible, these tools can help recover data from logical failures. Recuva is free and works on Windows; it scans for deleted files and recovers them to a different drive. EaseUS Data Recovery Wizard works on both Windows and macOS and handles corrupted file systems as well as deleted files. MiniTool Power Data Recovery is free for basic recovery and paid for advanced features. R-Studio is more technical and powerful but has a steeper learning curve.
All of these tools work the same way: you install them on a working computer, connect your failed external drive, and run a scan. The scan reads the drive sector by sector and reconstructs files from the data it finds. Once the scan completes, you preview the results and choose which files to recover. Recovery writes the files to a different drive — never write recovered files back to the same drive, because that can overwrite other recoverable data.
Recovery software is not may provide to find all your files, especially if the drive has been used extensively after the failure or if the file system damage is severe. The more you use a failed drive, the more data gets overwritten and the less recovery software can find. This is why stopping when ready is critical.
What to do with a drive after recovery
Once you have recovered the data you need, do not continue using the external drive for storage. If it failed once, it will fail again — drives do not heal themselves. Use the recovered data to back up to a new drive or cloud storage. If you want to reuse the external drive, you can attempt to reformat it, but this only works if the failure was purely logical. If the drive has physical damage, reformatting will not fix it and the drive will fail again soon.
To reformat a drive that appears in your computer, right-click it in File Explorer (Windows) or Disk Utility (macOS) and select "Format." This erases all data and rebuilds the file system. The drive may work normally after this, or it may fail again within days or weeks. There is no way to know without using it. If you do reformat and the drive fails again, professional recovery will be more expensive because the original file system is gone.
For a drive that made unusual noises or did not appear in your computer, do not attempt to reformat. The physical damage is still there and reformatting will not address it. Dispose of the drive responsibly — many electronics recyclers will accept external drives, and some will securely erase the data before recycling the components.
Frequently Asked Questions
Can I recover data if the external drive is not showing up in my computer at all?
Maybe, but it depends on why it is not showing up. If the drive makes clicking or grinding noises, has a burning smell, or shows visible damage, it has physical failure and needs professional recovery. If it is completely silent and straightforward does not appear, try connecting it to a different computer and different USB ports — sometimes the problem is with the port or cable, not the drive. If it still does not appear anywhere, it likely needs professional service.
Is it safe to use recovery software on my external drive?
Recovery software only reads the drive; it does not write to it unless you tell it to. The risk is time — scanning a large drive can take many hours, and the longer the drive is powered on, the higher the risk of additional damage if it has physical problems. If the scan is extremely slow or the software crashes, stop when ready. That usually means physical damage, and continuing will make it worse.
How much does professional data recovery cost?
Professional recovery typically costs between $300 and $3,000 depending on the type and extent of damage. A failed circuit board is usually cheaper to recover from than damaged platters. Services usually offer free diagnostics, so you can call and describe the problem before committing to a price. Ask whether they charge if recovery is not possible — reputable services will not charge if they cannot recover the data.
Can I recover data from a drive that was dropped or physically damaged?
If the drive still powers on and appears in your computer, you may be able to recover some data with recovery software before the damage gets worse. If the drive makes noises, does not appear, or shows signs of electrical damage, professional recovery is your only option. Do not attempt to open or repair the drive yourself — you will destroy the data permanently.
What should I do if my external drive keeps disconnecting and reconnecting?
This usually means a failing circuit board or early platter damage. Stop using the drive and back up any data you can access when ready, before it fails completely. Do not leave it powered on for long periods. If you cannot access the data, professional recovery is the next step. Continuing to use a drive that disconnects repeatedly will cause more damage and make recovery more expensive.