A:Answer Based on the retrieved data, regarding the eufy - SoloCam S340 2Cam Kit, it appears that cameras such as SoloCam models use secure local storage with built-in eMMC storage or expandable options with HomeBase 3. However, SoloCam cameras are often designed as standalone devices connected via WiFi only and do not inherently require a separate home base for operation.
If you are specifically asking if the SoloCam S340 camera kit directly uses HomeBase, the data doesn't explicitly mention it being compulsory, rather suggesting a WiFi-operated standalone security solution.