Group: Forum Members
It's not clear from your description how the backups you mentioned before seeing the "no set to append to" message were launched. Scheduled backups, including manual invocations of a scheduled task under the Scheduled Backups tab, run under the context of the user account specified under Defaults and Settings > Schedule, which by default is the Windows built-in SYSTEM account. As such, in order for a backup running in that context to access a network resource, it must have credentials valid for that resource, which are stored under Defaults and Settings > Network.
By comparison, backups started interactively under the Backup Definition Files tab would execute in your own user context.
The multiple connections error means that within a given Windows user context, you cannot connect to the same network resource with two different credentials simultaneously. So if something else you're using is running under the SYSTEM account and connects to the NAS using different credentials, then that might cause that error when running scheduled Reflect backups. Similarly, if you have something running within your user context that connects to that NAS and a Reflect running within your user context tries to use other credentials, that will also cause that error. Sharing folders by itself isn't a problem. The question is what credentials are being used to connect to the NAS.