I am not sure if its applicable for all these issues mentioned here by users. My NAS drive recently got an upgrade and ever since that happened, I was able to access my drive over the network only on Windows systems and not on any Android boxes. I believe I have a fix for this. It’s all do to with network services protocol.
Go to Settings, Network, Network profile. under Windows profile. select SMB protocol as SMB1, SMB2 after the update it was by default selected as SMB3 only. Once the system saves the settings, with your created admin users you should be able to map the drives on android phones and other systems as well.
