This read-only enumeration reports whether the most recent software transfer was idle (no transfer), a RAM-to-RAM transfer, or a flash-to-flash transfer, which reflects which memory banks were involved and at what throughput characteristics. An admin uses this to understand whether a completed download went through the faster in-memory path or the slower flash-to-flash path, which affects how long the operation should be expected to take. For example, seeing flashToflash after initiating a transfer via cdx6500DLSVInitiateTransfer confirms that operation used the flash bank copy path rather than a live RAM transfer.