nas storage images back uup

Can anyone recommend a NAS for backing up several PC's on my network. I currently have a Western Digital My Cloud but cannot access it from my new W11 PC. I logged into my WD account which just tells me that the device is obsolete now. So what good is backing up to a NAS if it becomes obsolete...

Hello all I looking into getting a NAS set up which NAS would your recommend please and also i looking at maybe a 4 bay NAS can you put into it say 2x2 TD drives and 2 x4 TD drives please? I looking forward to hearing from you! Thanks3 Brian