| Type | Internal HDD, NAS-optimized | Internal HDD, NAS-optimized |
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| Capacities | 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 TB | — |
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| Interface | SATA | SATA 6Gb/s |
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| Form Factor | 3.5-inch | 3.5-inch |
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| Spindle Speed | 7200 RPM | 5400 RPM (IntelliPower) |
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| Recording Technology | CMR | — |
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| Cache | 256 MB (4, 6, 8 TB) or 512 MB (10 TB and above) | 64 MB |
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| Transfer Rate | Up to 217 to 287 MB/s depending on capacity | — |
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| Workload Rate | Up to 550 TB/year | — |
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| MTBF | Up to 2.5 million hours (projected values per footnote) | — |
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| Technologies | NASware, OptiNAND, ArmorCache, TLER | — |
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| Warranty | 5-year limited | — |
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| Dimensions | 147 x 101.6 x 26.1 mm | — |
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| Weight | 670 to 750 g depending on capacity | — |
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| Model Numbers | WD4006FFBX, WD6006FFBX, WD8006FFBX, WD103KFBX, WD122KFBX, WD142KFGX, WD161KFGX, WD181KFGX, WD202KFGX, WD221KFGX, WD241KFGX, WD260KFGX | — |
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| Capacity | — | 4 TB |
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