Posted in the Networking forum before, but after reading a bit, here might be more suitable. The ol' Time Capsule has parted from me, and I like to interpret this as an opportunity to step up my game slightly. I looked at ready-made NAS options, but decided against those, so now I'm looking at a Mac Mini server. What I want to achieve: a) Time Machine backups for 2-3 Macs b) Torrenting machine c) iTunes server for music and film d) Photos server. My questions: 1. For torrents (b) I'd like to send Transmission traffic through a VPN and implement a killswitch too. Any (permanent) interference with the other use cases this might cause? What if, in the future, I want to use the server as an internet cloud too - any problems with it there? 2. For iTunes media (c), I'd like to store the library on an external RAID. Thunderbolt is too expensive. Would USB 3.0 (like the WD My Book Duo for example) do the job? How 4K-ready would this be for streaming without any transcoding? And any limitations to transcoding for iOS devices here? Are there any likely scenarios where I would run into bandwidth issues on USB 3.0? It seems either Ethernet or HDD would bottleneck first. As is probably obvious, I have very little experience with these storage things, so if you have any other remarks, go for it. 3. How do people go about (d) centralising their Photos library? It seems there is no native equivalent of iTunes' Homesharing, is there? I'd appreciate hearing your thoughts.