4TB portable USB-C solid state drive
Crucial X9 4TB Portable SSD – CT4000X9SSD9
The Crucial X9 4TB is a compact USB-C portable solid state drive rated for up to 1,050MB/s read, with no ip rating published protection and a 3-year limited warranty manufacturer warranty.
- Capacity
- 4TB
- Read / write
- 1,050MB/s read
- Interface
- USB 3.2 Gen 2 (10Gb/s)
- Warranty
- 3-year limited warranty
Dependable portable storage for everyday files and backups
The Crucial X9 4TB CT4000X9SSD9 provides plug-and-play portable storage for compatible computers, tablets, phones and gaming consoles. Its compact enclosure, USB-C connection and published drop resistance make it a practical choice for moving libraries and keeping local backup copies.
Up to 1,050MB/s read
The X9 is rated for sequential reads up to 1,050MB/s on a suitable USB 10Gb/s host.
4TB portable capacity
The selected model provides 4TB rated space for photos, videos, games, documents and backups.
Compact 65 × 50 mm body
The small polycarbonate enclosure includes an integrated lanyard hole for easier carrying.
Drop-resistant design
Crucial rates the X9 for drops up to 2 metres on a carpeted floor.
Broad listed compatibility
Crucial lists Windows, macOS, Android, iPad, Xbox and PlayStation, subject to host and formatting requirements.
Backup use
The official materials list Windows File History, Apple Time Machine and Acronis True Image workflows.
Who is the Crucial X9 4TB best for?
A strong choice for
- Portable photo, video and document libraries
- Local computer backups
- Moving files between compatible USB-C devices
- Additional storage for supported consoles
- Everyday travel and study storage
Consider another model if you need
- You need a published fixed write-speed figure
- You need an IP-rated enclosure
- You need 20Gb/s USB performance
- Your host only has USB-A and you do not have an adapter
Key specifications
- Model
- CT4000X9SSD9
- Capacity
- 4TB
- Sequential read
- Up to 1,050MB/s
- Sequential write
- No fixed numeric figure published
- Interface
- USB 3.2 Gen 2 (10Gb/s)
- Connector
- USB Type-C
- Factory format
- exFAT
- Protection
- No IP rating published
- Drop resistance
- Drop resistant up to 2 m on a carpeted floor
- Dimensions
- 65 × 50 mm footprint
- Warranty
- 3-year limited warranty
Full technical specifications
Capacity, connection and performance
| Model | CT4000X9SSD9 |
|---|---|
| Product family | Crucial X9 |
| Capacity | 4TB |
| Drive type | Portable solid state drive |
| Sequential read | Up to 1,050MB/s |
| Sequential write | No fixed numeric figure published |
| Interface | USB 3.2 Gen 2 (10Gb/s) |
| Connector | USB Type-C |
| Included data cable | USB Type-C to Type-C cable |
| USB-A connection | Adapter required and sold separately |
Durability and physical design
| Drop resistance | Drop resistant up to 2 m on a carpeted floor |
|---|---|
| Water and dust resistance | No IP rating published |
| Enclosure | Polycarbonate |
| Dimensions | 65 × 50 mm footprint |
| Weight | Not specified in the official flyer |
| Activity light | Not specified |
| Lanyard provision | Integrated lanyard hole |
Format, compatibility and support
| Factory file system | exFAT |
|---|---|
| Listed platforms | Windows, macOS, Android, iPad, Xbox and PlayStation |
| Mobile requirement | Compatible mobile hosts require USB Mass Storage over OTG |
| Reformatting | Can be reformatted to NTFS, APFS and other formats |
| Password protection | No dedicated password feature specified |
| Encryption tools | Can be used with supported platform encryption tools |
| Package contents | Crucial X9 Portable SSD, USB-C to USB-C cable and Quick-Start Guide |
| Warranty | 3-year limited warranty |
| Performance condition | Actual performance varies with host hardware, cable, software and workload |
| Capacity note | Usable capacity is lower after formatting and other functions |
Frequently asked questions about the Crucial X9 4TB
What is the CT4000X9SSD9?
The CT4000X9SSD9 is the 4TB Crucial X9 portable USB-C SSD.
What capacity does the CT4000X9SSD9 provide?
It provides 4TB rated capacity; usable capacity is lower after formatting and other device functions.
What read speed does the CT4000X9SSD9 support?
Crucial rates the CT4000X9SSD9 for sequential reads up to 1,050MB/s on suitable host hardware.
What write speed does the CT4000X9SSD9 support?
Crucial does not publish a fixed numeric write-speed figure for the CT4000X9SSD9.
Which connection does the CT4000X9SSD9 use?
It uses USB 3.2 Gen 2 (10Gb/s) through a USB Type-C connector.
Is the CT4000X9SSD9 resistant to drops?
Yes. Crucial rates it for drop resistant up to 2 m on a carpeted floor.
What environmental protection does the CT4000X9SSD9 provide?
The CT4000X9SSD9 is specified with No IP rating published protection; it should not be submerged.
Which platforms are listed for the CT4000X9SSD9?
Crucial lists Windows, macOS, Android, iPad, Xbox and PlayStation. Compatibility can depend on formatting and host capability.
What comes with the CT4000X9SSD9?
The package includes crucial x9 portable ssd, usb-c to usb-c cable and quick-start guide.
What warranty applies to the CT4000X9SSD9?
Crucial specifies 3-year limited warranty for the CT4000X9SSD9.
- Maximum speed requires a host and cable that support the stated USB interface.
- Compatibility can depend on host capability, operating-system support and file-system format.
- No IP rating published does not mean the drive can be submerged.
- Actual performance and usable capacity vary with host, workload and formatting.
