Hi there, as you haven't mentioned if the Seagate Central HD is physically damaged, I guess you can give iBoysoft Data Recovery Software a try.
iBoysoft Data Recovery Software is a powerful utility for scanning hard drives and recovering lost files. You can download it on your device and then connect the Seagate Central HD for data recovery.
Also read: [Solved] How to recover lost data from dead Seagate external hard drives?