+1
I come from Synology for my Home Lab and TrueNAS at work and it's just a doozy to do something like that and it's soooo useful. I use it to limit backup folders or "home cloud" storage space for family members. I discovered late you couldn't do in unraid. If I had known, I would have switched to TrueNAS for my home lab... that's a bummer. Now I have to keep my Synology around.
Please add this feature for a future release ?