My ideal solution would be 20TB SSD on USB 
Sadly, to my NUC I only have connected 2 additional, unused ssds but only about 5.4TB of space, I need about 10TB more. I could optimize my library, but I like to be surprised by roon radio
But I am intrigued why NAS is far from optimal solution on 500k library? NAS right now works just like a network drive, shouldn’t be any different or slowed down. NAS shouldn’t do any other operations that are worse than doing streaming via Tidal or Qobuz - as shown on videos - copying from NAS to C:/ with speed 100mbs, which should be decent for 1 gbit network.
Later or tomorrow I will try to connect NAS to switch or I will try to change switch to unmanaged netgear switch. But It doesn’t answer a question why it behaves like in second video, when memory and cpu usage sharply rise without any specific reason. All processes should be in the BACKGROUND, not causing interruptions.
As for memory - honestly, I need to check if I have free bank, propably I have 2 x 8GB, so I need to invest in 2 x 16gb, if even possible in my model to use 16gb in dice. Once, I read that 16gb wouldn’t be never used by Roon…
I am somehow dissapointed that when already investing “few” bucks in hardware app is so bad optimized that 8 core x 2.7Ghz and 10GB for software is not enough to play a song.
Oh, come on! When I wrote it, I realized how absurd it is! What is the safe file count then? Something is not right here.
There is a guy, Uwe. How many should I have with 16gb?