Reolink NVR's HDD type is surveillance type. You can refer to the picture below to know more about the HDD specs of Reolink NVR.
Applies to: Reolink NVRs.
| NVR model | HDD/SD card | Size |
| RLN12W | built-in HDD | 2TB (support up to 16TB) |
| RLN8-410 (H3MB02/H3MB16) | built-in HDD | 2TB (support up to 4TB) |
| eSATA | support up to 4TB | |
| RLN8-410 (H3MB18/N3MB01/N2MB02/N7MB01) | built-in HDD | 2TB (support up to 6TB) |
| eSATA | support up to 6TB | |
| RLN16-410 (H3MB02) | built-in HDD | 3TB (support up to 4TB) |
| reserved HDD location | support up to 4TB | |
| eSATA（only for 5MP version RLN16-410） | support up to 4TB | |
| RLN16-410 (N6MB01/H3MB18) | built-in HDD | 3TB (support up to 6TB) |
| reserved HDD location | support up to 6TB | |
| RLN36 | 3*built-in HDD location | 3*16TB |
Note: 4K version RLN16-410 NVR didn't have an eSATA port.
If you need to replace the HDD or add an HDD for Reolink NVR, please refer to: The HDD Recommended/Compatible List