2018-10-18, 23:10
(2018-10-18, 22:13)frank74 Wrote: About the network connection.. I will test it next weekend... because i split my connection in 2x 100M because i have only one Cat6 cable and my TV also needs network
You're maxing out your (artificially) limited network connection. If you've configured non-standard caching in Kodi then that might explain why some activities are taking longer.
I still have no idea why you are limiting your RPi3+ network connection to 100Mbps - your explanation makes no sense.
I would suggest you either fix your network (and accept that even at full capacity - ~330Mbps - it's still going to be more sluggish than a decent SD card). Or just buy a decent SD card and forget about booting over NFS.
I'm pretty sure the problems you are experiencing are of your own making...