Do you have a SQLite in-memory database with several TADMemTable / other datasets connected to it using FireDAC LocalSQL ?
If yes, then backup will not copy content of the datasets, because they are represented as SQLite virtual tables. Backup copies only content of the regular tables.
As workaround you should:
- perform CREATE TABLE ... AS SELECT ... commands for each ADMemTable to copy them to regular tables;
- set ADLocalSQL.Active to False;
- perform backup.