Crucial X9 Pro 4TB
Score: 94/100
Kingston SPSD
Score: 91/100Rankings
The Crucial X9 Pro 4TB delivers fast, secure, and rugged portable storage in a tiny package, though users note the short cable and lack of a USB-A adapter.
The Kingston Dual USB-A/C 1TB SSD offers a unique cable-free, thumb-drive-sized design with dual connectors and near-spec USB 3.2 Gen 2 speeds, delivering ultra-portable high-performance storage, though it suffers from port blocking, thermal throttling and lacks rugged protection.
| Attribute | | |
|---|---|---|
4,000 GBbest | 1,000 GB | |
1,050 MB/sbest | 1,050 MB/sbest | |
1,050 MB/sbest | 950 MB/s | |
5 yearsbest | 5 yearsbest | |
| ↓ lower better | 38 g | 13 gbest |
| ↓ lower better | 10 mm | 8.6 mmbest |
| ↓ lower better | 65 mmbest | 71.85 mm |
| ↓ lower better | 50 mm | 21.1 mmbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Performance(2) | ||
Interface | USB 3.2 Gen 2 | USB 3.2 Gen 2 dual |
Sequential Write Speed (MB/s) | 1050 MB/s | 950 MB/s |
Security(1) | ||
Hardware Encryption | true | false |
Compatibility(1) | ||
Supported Operating Systems | Windows, macOS, Linux, Android, iPadOS, Xbox, PlayStation | Windows 11, macOS 13.7.6+, Linux, Chrome OS, Android, iOS/iPadOS |
Storage(2) | ||
Storage Capacity (GB) | 4000 GB | 1000 GB |
NAND Type | TLC | QLC |
Power(1) | ||
Power Source | Bus-powered | USB |
Build & Design(4) | ||
Weight (g) | 38 g | 13 g |
Thickness (mm) | 10 mm | 8.6 mm |
Length (mm) | 65 mm | 71.85 mm |
Width (mm) | 50 mm | 21.1 mm |
Products in the top-left offer the best value (high score, low price).
Professional reviewers rate the X9 Pro highly, calling it a tiny, near-perfect external SSD with sturdy frame and hardware encryption, while noting it falls short of the X10 Pro's top-tier speeds.
Everyday users appreciate its pocket-sized form factor, fast transfers, and rugged build, but complain about missing accessories and occasional speed gaps.
Professional reviewers commend the Kingston Dual Portable SSD for its clever dual-connector design, near-spec USB 3.2 Gen 2 speeds, and solid metal construction, calling it a convenient, high-performance alternative to traditional flash drives. However, they note practical drawbacks such as port blocking, fragile caps, lack of environmental sealing, and thermal throttling under sustained load.
Everyday users appreciate the drive's universal compatibility, lightning-fast transfers, and pocket-friendly size, often highlighting how it eliminates the need for cables. Common complaints revolve around the device's tendency to block neighboring ports, the easy loss of protective caps, heat buildup with speed throttling, and the absence of a tether or keychain loop.
“perfect for travel”
“easy to carry on a keychain”
“lack of a USB-A adapter is a frequent frustration”
