sjb wrote:

My Deleted folder is empty, but the Store folder still shows substantial
amount file size; same size in the my Backup, too.
The reason is....?

To clarify on the other responses suggesting that you compact, when you
delete an item it is not physically removed from the database file. It is
merely tagged with Delete status and the application merely hides those
deleted records from the user. It is possible to recover delete-marked
items (but that doesn't mean the app maker provides convenient tools to do
so). The delete-marked records remain in the database until you physically
purge those records. Compacting is what physically purges the delete-marked
items from the database.