See here Roon Hardware Platform Suggestions for my experiences with a NUC with Gen3 i3 and then Gen5 i3 CPU - what you have here is Gen4 i5.
Now you will need a m.SATA SSD through a SATA Cable but with some thing like the Crucial MX500 https://eu.crucial.com/eur/en/ct250mx500ssd1 you will get read/write of 500 MB/s for the storage of the Roon database. The Media storage would have to be USB DAS or NAS as no other storage options in the NUC.
Before you get concerned or the ‘get as much horsepower as possible’ recommendations come in, see here List Your NUC Capabilities Here for benchmarked performance of a ROCK server on a NUC5i3 doing multi zone DSP just as well as a NUC7 and NUC8 unit.