You connect an external hard drive through a USB-C hub.

The drive spins up.

Then you hear a click.

The motor slows or stops.

A few seconds later, it spins up again.

Sometimes the drive disappears from Finder or File Explorer at the same moment.

That behavior deserves attention—but not every click means the hard drive is mechanically dead.

Seagate notes that some soft clicking or chatter can occur during normal hard-drive activity, while new excessive grinding, clanking, or persistent abnormal noise is more concerning. Seagate also says insufficient electrical power can cause problems with USB-powered external drives and recommends testing the drive directly rather than through a hub. See Seagate’s official noisy disk drive guidance.

The key is to combine the sound with three other clues.

Start With the 4-Clue Diagnosis Card

Before changing anything, watch the drive for about 30 seconds.

Record:

These combinations tell you much more than the sound alone.

For example:

Click + LED resets + drive disappears + spins up again
→ strongly investigate power or USB connection resets.

Occasional light click + LED stable + files remain accessible
→ may simply be normal drive activity.

Loud repeated clicking even when directly connected
→ stop treating the hub as the main suspect.

Pattern 1: Click → Spin Down → Spin Up Again

This is the classic power-reset pattern.

It may look like:

Drive spins → Click → Motor stops → Drive disappears → Drive spins again

First simplify the setup to:

Laptop → USB-C Hub → External HDD

Disconnect:

• SSDs
• Phones
• Webcam
• Capture card
• Card reader
• USB audio
• Other bus-powered devices

Then test again.

If the clicking/restart cycle stops when the hard drive is the only USB device, the combined peripheral load is an important clue.

Western Digital's official support documentation specifically notes that an external drive may fail to spin up or may click when the USB port does not provide enough power, and recommends trying a different cable, USB port, or computer. See Western Digital’s external drive spin-up and clicking guide.

Pattern 2: The Drive Works Directly but Restarts Through the Hub

This is one of the most useful comparisons.

Test:

External HDD → Computer

instead of:

External HDD → USB-C Hub → Computer

Keep the same drive and storage cable.

Direct connection is stable

If the drive runs normally for several minutes directly but starts clicking, spinning down, or restarting only through the hub, investigate:

• Hub power availability
• Hub USB port
• Host connection
• Other attached devices
• Laptop power state

If your laptop has USB-C but the HDD uses USB-A, a 5Gbps USB-C to USB 3.0 data adapter can be used for a simpler direct test without routing the hard drive through a multiport hub. The current LENTION page shows Add to cart and specifies data transfer up to 5Gbps. This adapter does not add extra power; its role here is only to simplify the test path.

Direct connection also clicks or restarts

The hub becomes less likely to be the main cause.

Try one known-good cable and, if practical, another computer.

If the abnormal sound follows the hard drive across different connections, prioritize the drive itself and your data.

Pattern 3: The Problem Starts When Another Device Is Added

Suppose this is stable:

Hub → External HDD

but this triggers the restart:

Hub → External HDD + SSD

or:

Hub → External HDD + Phone Charging

or:

Hub → External HDD + Webcam + Monitor

That is different from an HDD that clicks even when connected alone.

LENTION's existing guide on USB-C Hub Disconnects on Battery but Works with a Charger covers how changing available power and peripheral load can affect hub stability, including external storage.

Reconnect accessories one at a time:

Keyboard / Mouse → Ethernet → Webcam → SSD → Phone

If the hard drive begins restarting immediately after one particular addition, remove that device and repeat the test.

The point is not that the added accessory is necessarily defective.

It may simply reveal that the complete setup no longer has enough stable power margin.

Pattern 4: Moving the HDD Cable Causes an Immediate Click or Restart

Now stop changing software settings.

Gently test the connection near:

• HDD connector
• Hub USB port
• Cable strain-relief area

If moving the cable repeatedly causes:

Click → disconnect → spin-up

test another known-good storage cable.

Western Digital’s external drive troubleshooting guidance recommends replacing the USB cable when troubleshooting an external drive that fails to spin up or makes clicking sounds, and warns that unsuitable cables can contribute to insufficient power delivery.

Avoid testing through:

• USB extension cables
• Long adapter chains
• Loose couplers
• Damaged connectors

Keep the storage path short while diagnosing the problem.

Pattern 5: The Drive Clicks After Sleep or Wake

If the drive works normally during use but spins down, reconnects, or disappears after the laptop sleeps, the problem may involve the way the USB connection transitions between power states rather than continuous under-powering.

For Mac users, especially if macOS also displays an unsafe-removal warning, see Disk Not Ejected Properly on Mac? Fix USB-C Hub Disconnects. That guide focuses specifically on storage interruptions around sleep/wake, direct testing, cables, power, and hub resets.

Do not keep an unstable hard drive connected during an important backup simply to see whether the problem happens again.

Pattern 6: The Drive Makes Loud, Hard Clicking Even When Connected Directly

This is the point where the priority changes.

Seagate’s official noisy disk drive guidance distinguishes softer operating clicks from loud or excessive grinding/clanking noises, noting that the latter can indicate a physical drive problem.

If the hard drive:

• Makes a newly developed loud click
• Produces grinding or clanking
• Cannot stay spinning even when directly connected
• Is not recognized on another computer
• Keeps restarting with multiple known-good cables

stop repeatedly power-cycling it just to continue troubleshooting the hub.

If the data is important and still readable, copy the critical files first.

If the drive is not reliably readable and contains irreplaceable data, avoid destructive repairs or formatting until you have decided whether professional recovery is warranted.

The question is no longer:

“Which hub setting should I change?”

It becomes:

“Is this drive safe to keep operating?”

What About a Powered USB-C Setup?

If the HDD itself proves stable directly and only becomes unreliable through a multi-device hub setup, improving the power arrangement can make sense.

For a fixed workstation using external storage alongside other peripherals, a USB-C docking station with 100W Power Pass-Through and dedicated USB 3.0 ports provides three USB 3.0 ports, two USB 2.0 ports and up to 100W power pass-through. LENTION's current product page specifically advises connecting the charger first when several high-power devices are in use, and currently shows Add to cart.

That does not mean a powered dock repairs a mechanically failing HDD.

Use it only after proving that the drive itself is healthy and that the instability follows the original hub/power configuration.

A Simple Drive Behavior Matrix

This helps prevent two opposite mistakes:

Mistake 1: Assuming every HDD click means mechanical failure.

Mistake 2: Assuming every repeated click is “just a USB-C hub power issue.”

Both can lead to the wrong troubleshooting path. Seagate's own documentation distinguishes normal operating noises from more serious abnormal noises and separately notes that insufficient power can affect USB-powered external drives.

Protect the Data Before Long Testing

If the hard drive contains important files and the connection is unstable:

1. Stop large file transfers.
2. Test the drive directly.
3. If it becomes stable, copy critical files first.
4. Do not repeatedly reconnect it through the failing setup.
5. Troubleshoot the hub after your important data is safe.

Repeated disconnects during writes can interrupt active storage operations, which is why LENTION's existing USB-C hub disconnection guidance recommends stabilizing power and connection before relying on external storage for important transfers.

When Should the Hub and Drive Be Replaced?

Examine the hub/power configuration when:

• Directly, the HDD is constantly stable.
• The identical cable functions directly
• Restarting is only possible via the hub.
• It is resolved by removing additional peripherals.
• Stability is increased by adding external power.

Examine the HDD directly when:

• Clicking moves the drive to a different machine.
• Even directly, the drive cannot sustain spin.
• A reputable cable is of no use.
• There are still loud, strange sounds.
• The accuracy of detection decreases.

Before determining if the external drive itself has failed, Western Digital’s external drive spin-up and clicking guide advises examining the cord, USB power, several ports, and another computer.

Final Decision

Listen to an external hard disk if it clicks, spins down, or repeatedly restarts via a USB-C hub, but don't rely solely on the sound to make a diagnosis.

Make use of four hints:

Sound

What type of click is that?

LED

Does the drive resume or lose power?

Visibility

Does the operating system lose it?

Set off

Does it occur only through the hub, after changing the cable, or after adding another device?

Next, analyze the pattern:

Examine the USB power path by clicking + restart just via hub.

When additional peripherals are added, the issue arises.
Reduce peripheral load and test power.

Restarting is caused by cable movement.
Replace or check the cable.

Direct drive stability increases the likelihood of a hub/power configuration.

The drive is always accompanied by loud clicking.
Make data security and drive health your top priorities.

The guideline to keep in mind is:

Troubleshoot the connection if the sound follows the hub. Safeguard the data if the sound follows the drive.

FAQ

My external hard disk only clicks over a USB-C hub; why is that?

Examine the available USB power, the hub port, the attached-device load, and the host connection if it functions fine when connected directly but only clicks, spins down, or resets via the hub. Western Digital expressly points out that an external drive may not spin properly if there is insufficient USB power.

Does clicking always indicate a failing hard drive?

No, Seagate claims that while loud or heavy grinding or clanking is more worrisome, some gentle clicking or chattering may be normal during drive performance.

Can a hard disk resume due to low USB power?

Yes, Western Digital records instances in which an external drive fails to click or spin up due to insufficient power from the USB port or cable.

When I connect a phone or another SSD, why does my HDD restart?

The additional load is a crucial sign that the entire hub configuration might not have enough power margin if the HDD is stable on its own but only restarts when another bus-powered device is connected. Similar behavior with multiple peripherals and external storage is described in LENTION's power-related hub troubleshooting guide.

Should I connect an external HDD to a powered USB-C hub?

When the proven issue is insufficient bus power, it can be beneficial. According to Seagate’s external-drive guidance, if the original computer is unable to supply adequate power to run the external drive, a powered USB hub might be useful.

If a drive is making loud clicking noises, should I continue testing it?

Prioritize your data and drive health over constantly reconnecting it if a new loud clicking, grinding, or clanking sound continues even during direct connection. Excessive clanking or grinding may indicate a physical drive issue, according to Seagate.