WIch disks to use

I recently had a power outage and my discs are practically damaged (My Book Live Duo - 2 x 3 TB disc). The NAS case is still working. Do you think I can buy 2 new discs and use them with the case, or should I choose a new device? I have another option, which is an Ubuntu server. I’m already working and I just need the disk set …

In any case, what brand and model do you suggest you buy?