You will encounter the issue with any NAS, it is not just for this. Be patience, NAS devices are not the same as USB drives and there is a learning curve, be patience and research/read/play with it, you will get there…
Anyhow, it has to do how you connect to the NAS for the first time, it still has the “guess” credentials if you connected to the Public folder first.
Anyhow see these posts see if they help.
