This is a wild guess, but I had issues of the box locking up hard under network load, due to an incorrect device tree. (using 200 MXQ 4k on a 201 MXq 4k board)
Everything seemed to be working, just random hard hangs, when the network was being used a bit more heavy (both during playback as well as things like backup and restore). Using the right device tree solved that for me.
Thanks for your reply !
I used this device tree:gxbb_p200_2G_1Gbit.dtb If my understanding is good: Tronsmart Vega S95 telos has 2 GB internal memory with Gigabit LAN, so the mentioned tree should be good.
But correct me if I am wrong.
Maybe I can change the SMB to NFS as kszaq wrote it here.