| Type | Internal HDD, enterprise class | Internal HDD, NAS-optimized |
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| Capacities | 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 TB | 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26 TB |
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| Interface | SATA | SATA |
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| Form Factor | 3.5-inch | 3.5-inch |
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| Spindle Speed | 7200 RPM | 7200 RPM |
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| Recording Technology | CMR | CMR |
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| Cache | 256 MB (4-8 TB and WD121KRYZ) or 512 MB (other models) | 256 MB (4, 6, 8 TB) or 512 MB (10 TB and above) |
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| Transfer Rate | Up to 255 to 291 MB/s depending on model | Up to 217 to 287 MB/s depending on capacity |
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| Workload Rate | Up to 550 TB/year | Up to 550 TB/year |
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| MTBF | Up to 2.5 million hours | Up to 2.5 million hours (projected values per footnote) |
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| Technologies | HelioSeal, ArmorCache, OptiNAND | NASware, OptiNAND, ArmorCache, TLER |
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| Warranty | 5-year limited | 5-year limited |
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| Operating Temperature | 5 to 60 C | — |
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| Non-Operating Temperature | -40 to 70 C | — |
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| Dimensions | 5.79 x 4 x 1.03 inches | 147 x 101.6 x 26.1 mm |
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| Weight | 750 g (listed for all models) | 670 to 750 g depending on capacity |
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| Model Numbers | WD4004FRYZ, WD6004FRYZ, WD8005FRYZ, WD103KRYZ, WD121KRYZ, WD122KRYZ, WD142KRYZ, WD161KRYZ, WD181KRYZ, WD203KRYZ, WD221KRYZ, WD242KRYZ, WD261KRYZ | WD4006FFBX, WD6006FFBX, WD8006FFBX, WD103KFBX, WD122KFBX, WD142KFGX, WD161KFGX, WD181KFGX, WD202KFGX, WD221KFGX, WD241KFGX, WD260KFGX |
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