Make sure your computer is on the same network as your Seagate NAS device.
Seagate Central Discovery Tool for Mac
Run the Seagate Discovery tool to locate your Seagate device from your Mac or PC while connected to your home network.
From your Mac, download the file by clicking the Download button on the right.
Double-click the .zip file. This should open a new window with the extracted files.
Open Contents>Mac and double-click on the Seagate Discovery tool file titled Discovery Tool_Mac_v18.104.22.168.
Follow the prompts to run the Seagate Discovery tool to discover your device.