The WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E costs $0.1475/GB while the Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 costs $0.0933/GB. Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 offers 37% better value per gigabyte as of May 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E vs Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 — Which Is Better Value?
Specification Comparison
| Spec | WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E | Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 |
|---|---|---|
| Brand | SanDisk | Crucial |
| Capacity | 4 TB | 4 TB |
| $/GB | $0.1475 | $0.0933 |
| Price | $589.99 | $373.29 |
| Retailer | Amazon | Amazon |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | nvme | ssd |
Price Across Retailers
WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E
Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902
Which Should You Buy?
Based on current pricing data, the Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 offers better value at $0.0933//GB compared to the WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E at $0.1475//GB — that's roughly 37% less per gigabyte.
The best deal for the Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 is $373.29 at Amazon, while the WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E starts at $589.99 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E and Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 product page for detailed specifications and price history.
Frequently Asked Questions
Is WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E or Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 a better deal?
As of May 2026, Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 offers better value at $0.0933//GB compared to WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E at $0.1475//GB. That is approximately 37% better value per gigabyte.
What is the price per GB of WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E?
The WD_Black SN7100 4TB NVMe SSD - Gen4 PCIe, M.2 2280, Up to 7,000 MB/s Read Speed, Up to 6,700 MB/s Write Speed, Next Gen TLC 3D NAND, for Laptops, Handheld Gaming Devices - WDS400T4X0E is currently priced at $0.1475/GB ($589.99 for 4 TB) at Amazon.
Where can I buy Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 for the cheapest price?
The cheapest price for the Crucial X9 4TB Portable SSD, Up to 1050MB/s, USB 3.2 USB-C, External Solid State Drive, Compatible with Windows, Mac, & Android, Reliable Storage for Games, Files, & Backups, Black - CT4000X9SSD902 is $373.29 at Amazon, which works out to $0.0933/GB.