I’ve got 10 12tb Seagate EXOS drives in operation right now and have also run small capacity (2-4tb) WD Red and blue and Seagate Barracuda drives. For ssds I run Samsung 870 evos.

Been considering building a mini lack rack to put on top of my lack rack to hold my mini PCs.

My cold storage is another Truenas box that powers itself up once a month, pulls an rsync and shuts down 2 hrs after that completes. Not quite what you asked for, but I don’t have to think about it. The drives in that server are the smaller drives (2-4tb) that have been in the main Truenas box and been retired from that duty.

right now just the Amcrest app. Eventually I want to add more cameras and set up a NVR.