Replacement for WD40E31X: Drop-In Alternatives We Stock
Looking for a replacement for the WD40E31X (WD40E31X - Western Digital Blue 4TB 5400RPM Multi-Level-Cell SATA 6Gb/s 64MB Cache 8GB NAND Solid State Drive 3.5-inch Hybrid Hard Drive)? Pro Disk Network ships Western Digital drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the WD40E31X
| SKU | WD40E31X |
|---|---|
| Product | WD40E31X - Western Digital Blue 4TB 5400RPM Multi-Level-Cell SATA 6Gb/s 64MB Cache 8GB NAND Solid State Drive 3.5-inch Hybrid Hard Drive |
| Current price | $1,004.46 |
| Stock status | In Stock |
| Detail page | View WD40E31X › |
Drop-in replacements for WD40E31X
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
WD40E31XSP - Western Digital Blue SSHD 4TB 5400RPM Multi-Level-Cell SATA 6Gb/s 64MB Cache 8GB NAND 3.5-inch Hybrid Hard Drive
SKU: WD40E31XSP
Price: $421.21
WD8-102990304 - Western Digital Blue SSHD 4TB 5400RPM SATA 6Gb/s 64MB Cache 8GB NAND Multi-Level-Cell 3.5-inch Hybrid Hard Drive
SKU: WD8-102990304
Price: $421.47
WD40E31X-00HY4A0 - Western Digital Blue 4TB 5400RPM Multi-Level-Cell SATA 6Gb/s 64MB Cache 8GB NAND 3.5-inch Hybrid Hard Drive
SKU: WD40E31X-00HY4A0
Price: $1,004.46
Western WDS400T4B0E Western Digital WDS400T4B0E Blue SN5000 4TB Quad-Level Cell PCI Express NVMe 4.0 x4 M.2 2280 Solid State Drive
SKU: WDS400T4B0E
Price: $829.47
Western WDS400T3B0A Western Digital WDS400T3B0A Blue SA510 4TB Triple-Level Cell 6Gb/s SATA SFF 2.5-Inch Solid State Drive
SKU: WDS400T3B0A
Price: $2,155.79
WD10J31X - Western Digital Blue 1TB 5400RPM SATA 6Gb/s 64MB Cache 8GB NAND Multi-Level-Cell 2.5-inch Hybrid Hard Drive
SKU: WD10J31X
Price: $659.01
WDS400T2B0A - Western Digital Blue 3D NAND 4TB Triple-Level Cell SATA 6Gb/s 2.5-inch Solid State Drive
SKU: WDS400T2B0A
Price: $831.42
SSC-D0064SC-2100 - Western Digital SiliconEdge Blue 64GB Multi-Level Cell SATA 3Gb/s 2.5-inch Solid State Drive
SKU: SSC-D0064SC-2100
Price: $570.29
SSC-D0128SC-2100 - Western Digital SiliconEdge Blue 128GB Multi-Level Cell SATA 3Gb/s 2.5-inch Solid State Drive
SKU: SSC-D0128SC-2100
Price: $882.29
Western WDS200T4B0E Western Digital WDS200T4B0E Blue SN5000 2TB Triple-Level Cell PCI Express NVMe 4.0 x4 M.2 2280 Solid State Drive
SKU: WDS200T4B0E
Price: $431.58
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.