You can follow the steps below to change FTP uploading path via Reolink App.
Whether or not a Reolink product can support FTP uploading depends both on the product model and the hardware version. To know if your Reolink device supports FTP, refer to: Which Cameras/NVRs Support FTP Uploading.
Step 1. Launch Reolink App and click the Settings button on the top-right corner.
Step 2. Tap FTP Upload > FTP Settings > Remote.
Step 3. Modify the remote upload directory as you need, if it is the root directory, you do not need to input anything.
You may also want to know: How to set up FTP for Reolink Products