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Yes, you can daisy chain external hard drives.
But there’s a lot more to it than just plugging one drive into another, and not all setups will work the way you hope.
When you daisy chain external hard drives, you’re connecting them in a series so that one drive links to the next, creating a single chain from your computer.
This is a handy way to add tons of storage without needing a separate port for every single drive you own.
In this post, we’ll explore exactly how to daisy chain external hard drives, which connections support it, and what you need to watch out for.
Let’s dig in.
Why You Can Daisy Chain External Hard Drives
The short answer is that you can daisy chain external hard drives, but the method depends entirely on the ports and protocols your drives and computer support.
Not every external hard drive is built for daisy chaining, but many modern ones are.
Here’s what makes it possible.
1. Thunderbolt Makes Daisy Chaining Smooth and Fast
Thunderbolt is the gold standard when it comes to daisy chaining external hard drives.
This technology was designed from the ground up to support multiple devices on a single port.
You can daisy chain external hard drives via Thunderbolt 3 or Thunderbolt 4, and each port on a drive can pass data down the line.
With Thunderbolt, you can connect up to six devices in a single chain, though you’ll want to keep power needs in mind.
This is the fastest way to daisy chain external hard drives, with speeds up to 40Gbps on Thunderbolt 3 and 4.
2. USB-C with DisplayPort Alt Mode Can Work, But It’s Tricky
USB-C alone doesn’t guarantee you can daisy chain external hard drives.
Standard USB-C ports on most computers are not designed for chaining, as they only support a single host connection.
However, if your USB-C port supports DisplayPort Alt Mode and your hard drives have two USB-C ports built in, you might be able to link them.
But even then, you can daisy chain external hard drives only if the drives themselves are hubs or have specific passthrough capabilities.
In most cases, you’ll find that USB-C external hard drives don’t have two ports, which means you can’t daisy chain them without extra hardware.
3. USB 3.0 and Older USB Ports Don’t Support Chaining
If you’re using USB 3.0, USB 2.0, or even USB-A connections, you cannot daisy chain external hard drives directly.
These protocols rely on a star topology, where each device connects directly to the host computer.
You’d need a powered USB hub to connect multiple drives, but that’s not true daisy chaining.
So, while you can daisy chain external hard drives with Thunderbolt, older USB standards will force you to use a hub instead.
4. Some Drives Have Built-In Daisy Chain Ports
Many professional-grade external hard drives, especially those aimed at video editors, come with two Thunderbolt ports specifically for daisy chaining.
For example, drives from brands like LaCie, G-Technology, and OWC often include dual Thunderbolt ports.
This means you can daisy chain external hard drives right out of the box, without needing adapters or splitters.
Always check the back of your drive for a second port, as that’s the clearest sign that chaining is supported.
How to Daisy Chain External Hard Drives Step by Step
Once you’ve confirmed your drives support daisy chaining, the process is pretty straightforward.
Here’s how to daisy chain external hard drives safely and effectively.
1. Check Your Drive’s Ports and Manual
Before you start, verify that each drive you plan to chain has two input/output ports.
If you see only one port, you can’t daisy chain external hard drives with that model.
Check the user manual or manufacturer’s website to confirm Thunderbolt support.
2. Connect the First Drive to Your Computer
Plug the first drive into your computer’s Thunderbolt or USB-C port using a high-quality cable.
Make sure the drive is powered on and recognized by your operating system before moving on.
3. Link the Second Drive to the First
Take another Thunderbolt cable and connect the second drive to the second port on the first drive.
This is where the magic happens, as the data flows through the first drive to reach your computer.
You can daisy chain external hard drives in this manner, adding a third, fourth, or fifth drive as long as you stay within the six-device limit.
4. Power Up Each Drive Individually
Every drive in the chain needs its own power source.
Bus-powered drives might not get enough juice when daisy chained, so use AC adapters whenever possible.
This is critical because if one drive loses power, it can break the entire chain.
Things to Watch Out For When You Daisy Chain External Hard Drives
Even though you can daisy chain external hard drives, there are a few pitfalls that could trip you up.
Here’s what to keep in mind.
1. Power Limitations Can Disrupt Your Chain
Thunderbolt provides up to 15 watts of power per port, but that’s often not enough for multiple drives.
If you try to daisy chain external hard drives that are bus-powered, you’ll likely see them fail to spin up or disconnect randomly.
Always use self-powered drives or plug in their adapters.
2. Cable Quality Makes a Big Difference
A flimsy or damaged cable can ruin your ability to daisy chain external hard drives.
Use certified Thunderbolt cables that are short and shielded to minimize signal degradation.
Longer cables can cause data errors, so keep your chain physically close together.
3. One Drive Failure Can Take Down the Whole Chain
When you daisy chain external hard drives, the chain is only as strong as its weakest link.
If the middle drive dies or is disconnected, all drives after it will lose connection to your computer.
This means you should back up critical data and consider whether chaining is worth the risk for your setup.
4. Performance Can Drop with Each Added Drive
While you can daisy chain external hard drives without losing all speed, bandwidth is shared across the chain.
If you’re transferring data between two drives that are chained, it will be slower than a direct connection.
For everyday backups, this is fine, but for heavy video editing, you might notice lag.
So, Can You Daisy Chain External Hard Drives?
You can daisy chain external hard drives when using Thunderbolt connections and drives that have dual ports.
The process is simple, but it requires the right hardware, individual power supplies, and quality cables.
You can’t daisy chain external hard drives over standard USB, so be sure to check your ports before you attempt it.
If you have the right setup, chaining gives you a clean, cable-free way to expand your storage massively.
Hope this post has helped you understand how to daisy chain external hard drives and what you need to get it done.