If you want to format the HDD or check the HDD status of your NVR via Reolink Client, check below.
Applies to: All Reolink NVRs.
Here is a video for your reference:
Step 1. Log in to the NVR on Reolink Client and click on the Device Settings button.
Step 2. Click on Storage. Choose the HDD you want to format and click on the Format button.