When files are uploaded via the Web Interface, they are automatically saved in the account's “Docs Dir” folder (which can be defined in the account window, under the Details tab). However under certain circumstances the Docs Dir folder cannot be accessed over the Web Interface, such as when no Docs Dir folder has been created for an account, or when it has been placed in the Deny Folders list.
For this reason, users should define an “Uploads Default Folder.” When a file cannot be uploaded to the account’s Docs Dir folder, it will be automatically uploaded to this default folder. To define the Uploads Default Folder, go to Tools > Options > Web Interface > Setup Folder Mapping button > Folder Mapping Settings window > Uploads Setting tab > Define default uploads field:
Uploads Default Folder