Never lose the data
The notes are valuable. If the machine running the database fails, no notes may be lost, and the service should keep working with as little downtime as possible. Fill the slots from the user to the second machine that keeps the notes safe.
User
?Empty slot
?Empty slot
?Empty slot
?Empty slot
Parts. Drag them into the slots, or tap a part and then a slot
Each part can be used more than once.