What kind of share is it? Samba / DLNA? Can other devices on the network see the file?
For the sound but no picture problem, is it a 4K HDR file? The #1 priority bug in current firmware is that 4K HDR files display on SDR TVs as sound but no picture. It's a retrogression bug because it worked fine in previous pre-production firmware. It will be fixed in next firmware 100% for certain.