Hello @shin_byoung_chul, sorry for troubles.
Roon doesn’t have such limitation - it can playback .dsf files, which are located in the network folders.
Can you please [describe your setup][1] and what exactly is happening in Roon when you try to playback a .dsf file located in the network folder.
Thanks
[1]: I'm having a problem with Roon -- where do I report it?