I want to create a NAS for my family at home. I am already pretty sure about using TrueNAS as software, but the hardware is still open.
What hardware do you recommend for 2TB of usable Storage (+a second drive for mirroring the first one) that is used by 3 people for pictures, videos, and documents?
2TB is insanely small for a NAS. At that point, you could honestly just run a Pi 5 with M.2 HAT and a 2TB SSD for something like $200 total. Could always buy a second Pi for mirroring and even locate it in a friend or family member’s house for mirroring and backup.
I use a Pi 4 with 7 TB of external SSDs just fine at home. It also hosts a pi.hole ad blocking server, my 1TBish jellyfin music streaming collection, my network share for kodi, an always-on VPN for my phone and laptops, and a few other small services. I’m sure I could upgrade for better read/write speeds. But everything is performant enough as is, and it’s completely silent and fan-free in my living room by the router. Honestly for most services a Pi with a passive cooler will perform admirably.
2TB is perfectly fine for a NAS. Not everyone needs high capacity
Of course, nothing wrong with it. In fact it makes OP’s quandary a lot easier! I’m looking into something with 20TB or so of capacity myself, and that’s given me an appreciation for how much simpler it is to solve this problem at 2TB.