You dropped your external drive off the desk and now it is making a clicking noise. Or you plugged in your USB flash drive and Windows says "You need to format the disk before you can use it." In both cases, your very first action determines whether your data can be recovered. In this guide, written for users in Ankara, we honestly explain the external drive and USB flash recovery process, what really comes back, and the hard realities of flash memory technology.

Quick Answer

If your external drive is clicking after a drop or impact, power it off immediately and do not plug it back in, because every spin-up can let the head scratch the platter. If a USB flash drive is not recognized or shows a RAW error, absolutely do not format it and do not write anything to it. Keep the device safe and bring it to the lab. The longer writing stays stopped, the higher your recovery chances remain.

External Drive or USB Flash? Why You Must Treat Them Differently

External drives and USB flash drives look similar from the outside, but inside they use completely different technologies, which is why their failure scenarios and recovery methods diverge.

An external drive (such as WD Elements, WD My Passport, Seagate Expansion or Toshiba Canvio) is essentially a regular mechanical hard disk placed inside an enclosure. It contains spinning platters, read/write heads flying microns above those platters, and a motor. This makes external drives extremely sensitive to drops, impacts and vibration.

A USB flash drive (USB stick) has no moving parts. Your data is held in semiconductor chips called NAND flash. Therefore the problems of USB drives are mostly electronic in nature: connector breakage, controller failure, NAND cell wear and circuit board damage.

The most critical rule both share is this: stop forcing the device the moment a symptom appears. On a mechanical disk, forcing increases physical damage; on a flash drive, the wrong intervention can corrupt the controller state even further.

External Drive Failures and What to Do

Clicking After a Drop or Impact (Click of Death)

When you drop your external drive or knock it against the desk while running, the most common symptom you will hear is a rhythmic clicking. This is often called the "click of death" and usually means the read/write head cannot align to the platter, repeatedly trying and resetting back to its starting point.

In this situation the only correct action is to power the drive off. Reconnecting it, trying it on another computer, or swapping cables repeatedly risks your data a little more each time. A misaligned head can physically scratch the magnetic surface of the platter. Data in the scratched area is permanently lost and may become unrecoverable.

The correct environment for a clicking drive is a dust-free cleanroom or clean bench. There, the drive is opened, the damaged head assembly is replaced with a healthy donor part, and the platters are read with specialized equipment. This work cannot be done in a home or office.

Not Recognized but No Noise

If the external drive makes no sound, its light is off or blinking, but it does not appear on the computer, the problem is often in the bridge board inside the enclosure (USB to SATA bridge) or in the drive's circuit board. In some cases removing the disk from the enclosure and connecting it directly via SATA helps with diagnosis, but this may affect the warranty and can cause additional damage if done incorrectly, so it is safer to leave diagnosis to the lab.

USB Connector and Cable Problems

The most common non-mechanical failure on external drives is wear of the micro USB or USB-C connector, or a faulty cable. In this case the drive is healthy, only the connection is interrupted. Often a proper cable replacement or connector repair solves the problem with no data loss. Still, forcing or wiggling the connector can damage the circuit board.

USB Flash Drive Failures

The Computer Does Not Recognize the Drive

If you get no response at all when you plug in your flash drive, the cause may be a broken connector, a cracked solder joint or a failed controller chip. Repeatedly plugging it into different ports and computers is not a solution. On the contrary, if there is a broken solder point, each insertion damages it further.

Connector or Circuit Board Breakage

USB drives are usually carried on keychains, in pockets or in bags, so their bodies are frequently subjected to bending stress. If the connector's solder legs on the board crack, the drive is no longer recognized. In such failures the circuit board is examined under a microscope, broken connections are re-soldered, and the data is read. Often the data in the NAND chip is intact; only the path to it is broken.

Controller Failure

Inside every USB drive there is a controller that acts as a translator between the NAND chip and the computer. This controller encrypts data, applies error correction and converts physical addresses into logical ones. If the controller fails, the data cannot be reached the normal way even if the NAND chip is healthy. In this case advanced labs use a method called chip-off to remove the NAND chip from the board and read it directly, then reverse the controller's algorithm to reconstruct the data.

Monolithic USB Drives and Chip-off

Today many small USB drives and memory cards are manufactured as monolithic units. That means the controller and NAND are combined inside a single resin block with no separate chip. Classic chip-off is not possible on these drives; instead, test points inside the block are located and read. This is a highly specialized process with no guarantee of success, and to be honest, not every monolithic drive can be recovered.

Format Error and RAW: Never Click That Window

If Windows asks "You need to format the disk in drive before you can use it. Do you want to format it?" when you plug in your external drive or USB flash, your drive has dropped into a RAW state. This means the file system tables (NTFS, exFAT, FAT32) are corrupted, but the data is most likely still in place.

In this window, never click "Format disk." Formatting writes a brand-new file system and greatly increases the risk of erasing your existing data structures. The correct action is to close the window and write nothing to that drive.

RAW errors are often logical and come back at a high rate with file system repair or raw recovery. The key is to intervene before anything is overwritten.

Accidental Deletion and Format: The Faster You Act, the Better

Accidentally deleting files or formatting the wrong drive is not as hopeless as it looks. When you delete a file or run a quick format, the data is not physically destroyed right away. The area is simply marked as "free and writable." The data stays there until something new is written over it.

That is why the critical rule is: the moment you notice the deletion or format, write nothing to that drive, install nothing, copy no files, and if possible stop using it. Every new write increases the chance of overwriting the deleted data.

An important warning: on SSDs and modern USB drives, if the TRIM feature is active, deleted data may be automatically cleared in the background by the system. Therefore, on flash-based devices, intervening on deleted data is more time-sensitive than on a mechanical disk.

Flash NAND Realities: Not Everything Comes Back

For the sake of honesty, the limits of flash memory must also be explained. NAND flash cells withstand only a limited number of write/erase cycles. In cheap, heavily used drives the cells wear out, the controller disables bad blocks, and beyond a certain point the drive can suddenly become unreadable.

Furthermore, in flash memory the data is held in a physically scattered and complex manner due to the wear leveling, encryption and error correction layers applied by the controller. Even if raw NAND is read via chip-off, turning that raw data into meaningful files (solving the NAND logic) requires advanced expertise and full success cannot always be guaranteed.

In short: success rates for connector, solder and circuit board failures on USB drives are generally high; for heavy NAND wear and monolithic block damage, the honest expectation is partial recovery or, in some cases, recovery not being possible at all.

Which Scenario Recovers What? Quick Table

The table below summarizes the general recovery expectation for the most common external drive and USB flash failures. These rates are estimates based on general experience; every case depends on the device's condition.

Symptom / Failure Device Type Likely Cause General Recovery Expectation
Clicking after a drop External HDD Head misalignment / damage High (if powered off early)
No sound, not visible External HDD Bridge board / PCB High
Broken connector or cable External HDD / USB Connection interruption Very high
Not recognized, cracked solder USB flash Broken solder leg High
Controller failure USB flash Controller corruption Medium (via chip-off)
RAW / format error All File system corruption High (if no writing done)
Accidental delete / format All Logical loss High (if no TRIM)
Heavy NAND wear USB flash End of cell life Low / partial
Monolithic block damage USB / card Single block breakage Variable / not always

External Drive and USB Flash Data Recovery in Ankara

If you live in Ankara and have a problem with your external drive or USB flash, you are close to the right place. The DSET lab operates inside the Hacettepe Teknokent Beytepe campus and handles cases from every district of the city with the same care.

Which Districts Do You Come From?

For users coming from Çankaya and the Kızılay area, reaching Beytepe is quite easy; you can bring your device in person after work or during lunch. For those coming from more distant districts such as Keçiören, Yenimahalle and Etimesgut, we offer pick-up/drop-off and cargo options. If you are shipping from out of town, wrapping the external drive tightly in bubble wrap and sending it in a sturdy box prevents additional damage during transit.

Especially for clicking mechanical external drives, it is very important to keep the device powered off and not run it before handing it to cargo. Even re-energizing the device while moving it increases the risk.

The Local Advantage

Having a physical lab within Ankara is a significant advantage: it eliminates shipping time and lets you hand over the device in person and discuss the diagnosis result face to face. In urgent cases you can bring your device directly and quickly get an initial diagnosis.

For our main guide that covers the entire data recovery process in Ankara, success rates and frequently asked questions in greater depth, see our Ankara data recovery page. For problems with internal hard disks, our Ankara hard disk data recovery article helps, and for current pricing, our data recovery price list 2026 page is useful.

Practical Tips to Prevent Data Loss

A few simple habits when using external drives and USB flash drives greatly reduce future data loss.

Always use external drives on a flat, vibration-free surface and do not move them while running. Do not let the drive hang off the desk while cabled, because the smallest snag can drop it to the floor. Avoid keeping USB drives on a keychain under constant pressure. For important data, do not rely on a single device; keeping at least two separate backups (for example one external drive and one cloud copy) prevents a single failure from becoming a disaster. When removing the device from the computer, always use the safe eject option so a write operation is not left unfinished and the file system is not corrupted.

Frequently Asked Questions (FAQ)

My external drive was dropped and is clicking, what can I do at home?

Unfortunately the only thing you can safely do at home is power it off and never turn it on again. The longer a clicking drive stays on, the higher the platter scratch risk. Opening the drive in a dust-free environment for a head swap requires a cleanroom, so keeping the device off and bringing it to the lab is in your data's favor.

My USB drive turned RAW and asks to format, will I lose data if I format?

Formatting risks writing a new file system over your data and seriously lowers recovery chances. So never click format in that window. If you bring it in without writing anything to it, the data usually comes back via file system repair or raw scanning.

I deleted files by accident, what are my chances?

If you wrote nothing to that drive right after deleting, your chances are high, because deleted data physically remains until it is overwritten. However, on flash-based devices the TRIM feature can clear deleted data in the background, so acting as quickly as possible is important.

Can every USB drive be recovered?

No, that is the honest answer. Success rates are high for connector, solder and circuit board failures. But with heavy NAND wear or monolithic block damage, data may be partially recovered or in some cases not recovered at all. At the initial diagnosis we assess the situation clearly and give you an honest expectation.

I am outside Ankara, can I ship my device by cargo?

Yes. You can wrap the device tightly in bubble wrap and send it in a sturdy box. Especially for mechanical external drives, keep them powered off before shipping. We will help you with the cargo and pick-up/drop-off process.

Why DSET?

DSET has been serving in Ankara Hacettepe Teknokent Beytepe since 2003. Our data recovery success rate is 99.4%. The first diagnosis is free, and if no data is recovered, there is no charge. Contact us for support recovering data from your external drive or USB flash drive.

Phone: +90 536 662 38 09.

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