flavo,
I use the Melco HD app only with my Melco N1A music server which also functions as my systems NAS. Roon I use with my Roon Nucleus as well as my Bluesound kit. I also use BluOS with my Bluesound players. I’m still guessing that you are experiencing a network issue. Plugging in a USB storage device (flash drive or external hard drive, etc ...) directly to the Node just bypasses any network issues or corrupted path issues that you may be experiencing.
I use the Melco HD app only with my Melco N1A music server which also functions as my systems NAS. Roon I use with my Roon Nucleus as well as my Bluesound kit. I also use BluOS with my Bluesound players. I’m still guessing that you are experiencing a network issue. Plugging in a USB storage device (flash drive or external hard drive, etc ...) directly to the Node just bypasses any network issues or corrupted path issues that you may be experiencing.