I have a vaugely beefy QNAP TS-269L
TS-269L - Features | QNAP (UK)
It’s been upgraded to the maximum 3GB of ram and has a pair of 2TB drives inside it.
Its a surprisingly capable dual core Atom processor, and I have it running daily backups, a couple of sync jobs, and amazingly it managed (just) to act as my ROON server also.
The latter part is why I’m moving it on. I’d like to get a newer unit with SSD capability and a bit more grunt to do roon with a bit more snap.
TS-269L - Features | QNAP (UK)
IC / FS - QNAP TS-269L NAS - The Tat Bazaar - Audio Abattoir