@blenky My experiences are that BD works fine via SMB but UHD with HDR produces glitches on many players occasionally. Using USB is better and SATA the best. For this and other reasons started using my Zidoo as my NAS with HDDs attached via USB and SATA. Good to hear some players do work via SMB with any source format. It also highly depends on the SMB mode as SMBv2 and above are optimised on throughput only. Be sure to disable SMBv1 on W10 or other NAS for that and also security reasons.