I have an old QNAP and I hate it. It’s full of proprietary software that can’t be removed, and is slow, probably because it doesn’t have SSDs. It’s, I think, RAID1.
Basically just need something to back up my data on my local network that has encryption. Open source is always nice as well. Simple and fast!
The encryption is so if someone breaks in and takes off with your hardware, they don’t get your data too.
Of course, my backup software encrypts anyway, so I don’t bother to do volume encryption.
Volume encryption would either mean typing a password at boot, or needing to use the TPM, which would get stolen with the NAS, so either very inconvenient, or useless.
And I dont think anyone breaking in to steal a NAS is going to do it to read the data, they’ll sell the hardware for cash. Anyone who would break in for the data is likely a far more sophisticated threat, which is a bit paranoid.