Replacement for WD40EFRX: Drop-In Alternatives We Stock
Looking for a replacement for the WD40EFRX (WD40EFRX - Western Digital Red 4TB 5400RPM SATA 6Gb/s 64MB Cache 3.5-inch 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 WD40EFRX
| SKU | WD40EFRX |
|---|---|
| Product | WD40EFRX - Western Digital Red 4TB 5400RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive |
| Current price | $254.74 |
| Stock status | In Stock |
| Detail page | View WD40EFRX › |
Drop-in replacements for WD40EFRX
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.
WD40EFRX-68WT0N0 - Western Digital Red 4TB 5400RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD40EFRX-68WT0N0
Price: $254.74
WDBMMA0040HNC - Western Digital Red 4TB 5400RPM SATA 6GB/s 64MB Cache 3.5-inch Hard Drive
SKU: WDBMMA0040HNC
Price: $412.63
WD0740EFRX - Western Digital Red 4TB 5400RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD0740EFRX
Price: $564.47
WD4001FFSX - Western Digital Red Pro 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4001FFSX
Price: $210.53
WD4001FFSX-68JNUN0 - Western Digital Red Pro 4TB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD4001FFSX-68JNUN0
Price: $288.30
WD40EFZX - Western Digital Red Plus NAS 4TB 5400RPM SATA 6Gb/s 128MB Cache 3.5-inch Hard Drive
SKU: WD40EFZX
Price: $294.74
WD40EFAX - Western Digital Red NAS 4TB 5400RPM SATA 6Gb/s 256MB Cache 3.5-inch Hard Drive
SKU: WD40EFAX
Price: $318.32
Western WD4005FFBX Western Digital WD4005FFBX Red Pro 4TB 7200RPM SATA 6Gb/s 256MB Cache 3.5-Inch Hard Drive
SKU: WD4005FFBX
Price: $284.21
Western WDS400T2R0A-68CKB0 Western Digital WDS400T2R0A-68CKB0 Red SA500 4TB SATA 6Gb/s 2.5-inch NAS Internal Solid State Drive
SKU: WDS400T2R0A-68CKB0
Price: $1,984.21
WD30EFRX - Western Digital Red 3TB 5400RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD30EFRX
Price: $168.42
WD10EFRX-B2 - Western Digital Red 1TB 5400RPM SATA 6GB/s 64MB Cache 3.5-inch Hard Drive
SKU: WD10EFRX-B2
Price: $211.00
WD10EFRX-A1 - Western Digital Red 1TB 5400RPM SATA 6GB/s 64MB Cache 3.5-inch Hard Drive
SKU: WD10EFRX-A1
Price: $211.00
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.