Unzip files to a USB stick, insert to NVR Base unit, use the mouse to click on to Setup->Maintenance->Upgrade, click load file and choose the file: H7004_V230131V230131V221128V230209V230207V220827V230131V230131V191237
and then press Upgrade.

Wait for success message, power-off/on the NVR Base unit.

Make sure all cams are connected to a USB charger, are powered on and visible in the NVR. 

Now go to Setup->Maintenance->IP Camera Maintenance, tick all cams that are on-line, load file and choose the file: CH296I3X_F16M_SF_ENU_NORMAL_V33.21.5.2_220128_W, and then press Upgrade.

Wait for success message, cams should beep and be ready to use shortly after.