I was trying the "settings"->"multi-user mode" on my QNAP today and realized some issues on this. When adding users besides "admin" and "guest", these users will only share directories set at user "guest". Settings at the corresponding users will be ignored.
Furthermore, when logging in at the service to check visible media files, only media files being visible for the user "guest" will be shown (despite the actual different user)
Clients with preset user "guest" will be able to see shares of user "guest".
Clients with preset user "<whatever>" will be (only) able to see shares of user "guest" and nothing else.
Any ideas on how to solve this? I would like to give my kids access (only) to the kids media files while keeping different access at other media clients.
Settings: QNAP TS-451, Firmware 4.2.2, Twonky 8.2.1, clients: various