Would you save all data to the database when using the synchronization mechanism in the application?

It is not always advisable to save all data in the database when using a synchronization mechanism. Usually, only current and necessary data are saved to:

• avoid excessive use of memory and device resources;
• speed up the application's performance and synchronization;
• simplify data management and updates.

A common approach is to use caching: data needed for display and offline operation are stored locally, while others are loaded on demand. It is also important to implement a strategy for cleaning up outdated data.

In summary: save only the data that is truly needed for the application's operation and offline access, not everything indiscriminately.