OWC Envoy Ultra Review: Thunderbolt 5 SSD Performance & Speed Test

With every new generation of camera producing larger files and higher bitrates, the demand for faster transfer speeds is relentless. Now, with Apple's M4 Pro and M4 Max chips ushering in the new Thunderbolt 5 standard, the goalposts have moved once again. Can the OWC Envoy Ultra deliver the next step-change in portable drive speeds?

Other World Computing, or OWC, has built a reputation for being on the cutting edge of storage technology, especially for the Mac ecosystem. It was no surprise, then, that they were one of the first to market with a portable drive ready for this new standard. The OWC Envoy Ultra was the first Thunderbolt 5 portable SSD I saw back at NAB, and my goal was simple: see if this drive can truly keep up with the heaviest demands of a modern creative workflow.

Build and Design

Unboxing the Envoy Ultra, the first thing I noticed was its substantial feel, shared with previous OWC portable drives I’ve tried. The black aluminum housing is cool to the touch and has a reassuring heft to it.

At about three-quarters of a pound, it is not the kind of drive you slip into the pocket of a pair of skinny jeans, but it should still easily fit into any camera bag or jacket pocket. The design is clearly focused on durability and heat dissipation, while retaining enough portability to not interfere with transport.

OWC states the drive is IP67 rated, which means it is sealed against dust and can survive being submerged in up to a meter of water for 30 minutes. While I didn’t dunk it to test, this rating provides peace of mind for anyone shooting on location or traveling with their images. The SSD itself also adds some inherent resiliency, conferring shock resistance over HDD options.

The drive has a built-in Thunderbolt 5 cable, and initially, I was a little disappointed to see this. While TB5 certainly won’t be outdated anytime soon, captive cables have historically been a point of failure on portable devices. However, my concern was eased when I learned OWC has designed that cable to be user-serviceable, with replacement parts expected to be available in 2025. According to OWC, this integrated design is what enables the drive’s weather resistance, so it feels like a fair trade-off.

Performance

The Envoy Ultra’s main selling point is the performance enabled by the SSD and the paired TB5 connection. To get the most out of this drive, you need a computer with a Thunderbolt 5 port, so I connected it to a new M4 Pro MacBook Pro to see what it could do.

In my testing using synthetic benchmarks, the results were stunning for a portable, bus-powered drive. I consistently saw write and read speeds above 5,200 MB/s. These are numbers that, until now, were reserved for the fastest internal NVMe drives.

In real-world testing, results were equally impressive. I transferred a 100 GB folder of 8K video files and 100 MP images from the computer to the drive in about 30 seconds. While it’d be an unlikely combo, it’s worth mentioning that you’d need both a TB5 port and a source drive that can keep up to get these speeds.

It’s also important to note that with very large, continuous data writes, the drive’s speed will settle to a sustained rate. OWC rates this write-cache exhaustion speed at about 1,350 MB/s to 1,700 MB/s, depending on the drive’s capacity. This is a normal behavior for SSDs as their cache fills, and this sustained speed is still incredibly fast and more than enough for most high-bitrate video editing. Read speeds won’t drop, however, with the drive delivering great read speeds across massive synthetic reads and file integrity checks.

Throughout these transfers, the aluminum body only ever became lukewarm, and because it is a fanless design, operation is completely silent. This is a huge plus for anyone working on a set or in a quiet studio. It bucks a trend I’ve seen with some recent high-performance gear, which falls back to fan-based cooling or, even worse, an always-on fan.

If you don’t have a TB5-capable computer just yet, or want to use this drive across devices, it's important to note that it’s compatible back through TB3 on Mac, but requires TB4, TB5, or a USB4 port on PC. While you are not getting the full speed the drive is capable of on an older port, it is reassuring to know it both performs at the maximum capability of whatever port you plug it into and can enable you to access data across a range of recent devices.

Who Is This For?

The OWC Envoy Ultra is aimed squarely at a specific type of creative: a professional who needs the fastest in speed, in a reliable housing. For anyone using a new M4 Pro or M4 Max Mac, the Envoy Ultra offers external storage performance that can truly match (or exceed?) the speed of your internal drive.

If your work involves smaller file sizes on more relaxed delivery schedules, or you don’t have a computer with a Thunderbolt 5 port, this drive is likely overkill. You can find excellent Thunderbolt 4 or USB-C drives for less money per GB that will serve you perfectly well. The Envoy Ultra is a top-tier tool for those who need (or just want) the fastest out there.

The OWC Envoy Ultra delivers on its core promise. It is an exceptionally fast, incredibly well-built, and a portable SSD that sets a new performance benchmark. It proves that Thunderbolt 5 is not just vaporware, but a significant step forward in performance. The Envoy Ultra starts at $379.99 for the 2.0 TB and a 4.0 TB version is available for $549. Considering it is one of the very first Thunderbolt 5 drives available, the price feels even more reasonable than I expected.

What I Liked

• Revolutionary Thunderbolt 5 transfer speeds.

• Extremely rugged and IP67 water-resistant build.

• Completely silent and cool operation under load.

• User-replaceable cable design addresses a common durability concern.

What Could Be Improved

• Included cable is relatively short and attached.

• Mac Thunderbolt and Windows USB4 compatibility may be more limiting for users with older devices.