| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
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| Product Description | WD Red WD40EFRX - hard drive - 4 TB - SATA 6Gb/s |
| Type | Hard drive - internal |
| Capacity | 4 TB |
| Form Factor | 3.5" x 1/3H |
| Interface | SATA 6Gb/s |
| Data Transfer Rate | 600 MBps |
| Buffer Size | 64 MB |
| Features | Native Command Queuing (NCQ), IntelliPower, Advanced Format technology, NAS compatible, NASware technology, 3D Active Balance Plus , S.M.A.R.T. |
| Dimensions (WxDxH) | 101.6 mm x 147 mm x 26.1 mm |
| Weight | 680 g |
| Manufacturer Warranty | 3 years warranty |
| Designed For | My Cloud EX2; EX4 |








| Manufacturer's Code: WD40EFRX | Western Digital |