QNAP were just not as good a few years ago when I started down this road. nor do we know with the next Mac OS (annual events now) how it will handle new protocols etc. It can say it supports Time Machine and fail miserably after a few weeks. in testing lots of products claim certain functions work. I started on Synology a fair while ago and will not change unless I see some people have clear advantages with the QNAP. They build almost identical products at almost identical price points. In recent years I would say QNAP have improved the software side. QNAP was considered better hardware but their firmware was clearly poorer. Synology had the advantage for many years in their software.

The two big brands in this business are QNAP and Synology. Someone mentioned QNAP as a good fit for Mac - do you know anything of this? It will disappear from your entire network. It is not going to save you when you accidently deleted the entire movie directory instead of just one file in it. and the files do not exist anywhere else on your network. With 2 disks of 8TB you get 8TB total space. The normal NAS configuration is mirrored drives. You can split the TM backups over the volumes but IMHO it would be smarter to put all the backups on one and all your other files on the other.

if one fails it has no effect on the other. you can setup two completely independent drives. so you need to copy files to the disk you choose. C and D gives you the capacity you want but each drive is separate. it is a raid though and if you have ONE drive die. It is one option when you select how you want to setup the disks. ? So you mean you intend to use two separate drives.

Best nas for home use 2019