Can either of these be used to back up Linux Mint boxes? Which one is best for a home server.

Hey all!, I was just given 2 Buffalo NAS's. A LS720D LinkStation (16tB) and a TS3410D TeraStation (16tB). I'm formatting them both, and have cleared out the old admin & pswrds. From what I have read the LinkStation may be best for my home server. It will replace a Netgear ReadyNAS 214 (8tB). The TS3410D may be too much for my needs. I have 2 windows machines (10 & 11) 3 Linux Mint desktops. Also would like to backup a couple of phones and a andriod tablet. Which I can do thru the app. I also have 2 Amazon Fire Tablets that I have no idea if they can be backed up, LOL. Thoughts? TIA