Best Portable SSD for iPhone Duo (2026)
iPhone Duo’s USB-C port lists three jobs: charging, DisplayPort, and USB 3 at up to 10 Gb/s. A portable SSD for this phone is a drive whose own bus is that 10 Gbps class. The phone does not list USB4 or Thunderbolt, so a drive’s faster row on a computer port is a different host. The box includes a 1 m USB-C charge cable. The drive’s own cable is the one rated for its Gen 2 speed.
Use the Samsung Portable SSD T7. Samsung rates the T7, model family MU-PC, at USB 3.2 Gen 2, 10 Gbps, up to 1,050 MB/s read and 1,000 MB/s write when the host and the cable are Gen 2 and UASP is available. The body is 85 x 57 x 8.0 mm. The box includes a USB-C to C cable and a USB-C to A cable.
Our Top Picks at a Glance
Reviewed October 2026 · Specs checked against the manufacturer pages named below
USB 3.2 Gen 2, 10 Gbps, up to 1,050 / 1,000 MB/s.
Check Price at Amazon Read full review ↓SDSSDE61. USB 3.2 Gen 2, IP65, and a 3 m drop rating.
Check Price at Amazon Read full review ↓USB 3.2 Gen 2 up to 10 Gb/s, in a 0.35-inch metal body.
Check Price at Amazon Read full review ↓Disclosure: This page contains affiliate links. As an Amazon Associate affiliate, we earn a small commission from qualifying purchases at no extra cost to you.
How We Tested
The phone’s USB 3 line comes from Apple’s iPhone Duo technical specifications. Drive buses and speeds come from Samsung’s T7 manual and data sheet, SanDisk’s Extreme Portable pages, and the My Passport SSD data sheet.
The portable SSDs
Samsung Portable SSD T7 View on Amazon
| Bus | USB 3.2 Gen 2, 10 Gbps |
|---|---|
| Speed | Up to 1,050 MB/s read and 1,000 MB/s write |
| Needs | A Gen 2 host and cable, with UASP |
| Size | 85 x 57 x 8.0 mm |
| Cables | USB-C to C and USB-C to A |
Samsung’s manual says the T7’s best transfer is on USB 3.2 Gen 2 at 10 Gbps, and that USB 3.2 Gen 1, USB 2.0, and USB 1.1 run slower because of those interfaces. The 1,050 MB/s figure needs the enclosed cable, a Gen 2 host, and UASP. Models include MU-PC500, MU-PC1T0, MU-PC2T0, and the 4TB MU-PC4T0 on the data sheet.
Plug the drive’s USB-C cable into the phone. The port’s listed data ceiling is USB 3 at up to 10 Gb/s, which is this drive’s bus. A drive rated for USB4 or Thunderbolt still meets this phone at that 10 Gb/s line.
- 10 Gbps is the same class as the phone’s USB 3 port
- Samsung includes a USB-C cable
- The body is 8 mm thick
- The rating is already a 10 Gbps rating
- A USB 2 cable drops the link
- 1,050 and 1,000 MB/s need Gen 2 and UASP
- Password protection has to be off if another device reads the volume
- A faster bus on a different drive is a different host
SanDisk Extreme Portable SSD View on Amazon
| Model | SDSSDE61 |
|---|---|
| Bus | USB 3.2 Gen 2 |
| Speed | Up to 1,050 MB/s read and 1,000 MB/s write |
| Body | IP65. Drop protection up to 3 m |
| Box | USB-C to C cable and a USB-C to A adapter |
SanDisk lists the Extreme Portable SSD, model family SDSSDE61, at USB 3.2 Gen 2, with write speeds up to 1,000 MB/s. The data sheet lists read speeds up to 1,050 MB/s and write speeds up to 1,000 MB/s. The body is about 3.97 x 2.07 x 0.38 inches. IP65 and drop protection up to 3 m are on the product page. The box includes a USB-C to C cable and a USB-C to A adapter.
The 1TB black model is SDSSDE61-1T00-G25, and the family continues through 8TB. Those speeds are SanDisk’s figures for the drive. On iPhone Duo they sit on a port listed at USB 3 up to 10 Gb/s. Use the cable from the drive box.
- USB 3.2 Gen 2 matches a 10 Gbps port
- IP65 and a 3 m drop rating are on the product page
- The USB-C cable is in the box
- Capacities run from 500GB through 8TB in this model family
- The published speed still depends on the host and the cable
- The silicone shell adds a little bulk
- Hardware encryption is a separate step from plugging in
- It does not add a faster bus than the phone lists
WD My Passport SSD View on Amazon
| Bus | USB 3.2 Gen 2, up to 10 Gb/s |
|---|---|
| Speed | Up to 1,050 MB/s read and 1,000 MB/s write |
| Box | USB-C cable and a USB-A adapter |
| Size | 3.94 x 2.17 x 0.35 in |
| Extra | 256-bit AES hardware encryption. Drop rating 1.98 m |
The My Passport SSD data sheet lists USB 3.2 Gen 2 up to 10 Gb/s, read speeds up to 1,050 MB/s, and write speeds up to 1,000 MB/s. The same sheet lists USB 3.0 at up to 5 Gb/s and USB 2.0 at up to 480 Mb/s. Dimensions are 3.94 x 2.17 x 0.35 inches. The box includes a USB-C cable rated for USB 3.2 Gen 2 and a USB-A adapter. Password-enabled 256-bit AES is on the sheet. Drop resistance is up to 1.98 m.
Turn password protection off before another computer needs to read the volume. The drive is the compact pick. Its published bus is the same 10 Gb/s class as the phone’s USB 3 listing.
- 10 Gb/s is the interface line on the data sheet
- The USB-C cable supports USB 3.2 Gen 2
- A USB-A adapter is included for older computers
- The metal body is the compact one in this set
- Password encryption has to be handled before another device can read the volume
- The drop rating is 1.98 m, shorter than the Extreme’s 3 m
- Speeds are the drive’s published figures, not a phone benchmark
- USB 2.0 on the same sheet is 480 Mb/s
Buying Guide: match the drive to USB 3 at 10 Gb/s
Comparison Table
| Drive | Bus | Published speed | Cable in the box |
|---|---|---|---|
| Samsung T7 | USB 3.2 Gen 2, 10 Gbps | Up to 1,050 / 1,000 MB/s | USB-C to C and USB-C to A |
| SanDisk Extreme SDSSDE61 | USB 3.2 Gen 2 | Up to 1,050 / 1,000 MB/s | USB-C to C, plus a USB-A adapter |
| My Passport SSD | USB 3.2 Gen 2, up to 10 Gb/s | Up to 1,050 / 1,000 MB/s | USB-C cable and a USB-A adapter |
Frequently Asked Questions
Will a Thunderbolt 5 SSD run at its Thunderbolt speed on this phone?
The phone lists USB 3 at up to 10 Gb/s. That is the data bus on the spec.
Which cable should connect the drive?
Use the USB-C cable in the drive box. Samsung’s 1,050 MB/s figure is measured with the enclosed cable on a Gen 2 host.
Does the iPhone cable count as the data cable?
The box lists a 1 m USB-C charge cable. The drive pages rate their own cables for USB 3.2 Gen 2.
Does DisplayPort change the SSD speed?
DisplayPort is a separate line on the same USB-C port. The data line is USB 3 at up to 10 Gb/s.
Final Verdict
The Samsung T7 is the portable SSD whose 10 Gbps rating matches the USB 3 port on iPhone Duo. The SanDisk Extreme SDSSDE61 adds IP65 and a 3 m drop rating on the same bus. The My Passport SSD is the 0.35-inch metal drive, also listed at USB 3.2 Gen 2 up to 10 Gb/s.