Smart Update Won't Stop

[Voix]

I originally set up a scheduled daily backup using Smart Update. After realizing that Smart Update updates on the fly (is this correct?) I decided to switch to "Copy Different Files."

But my files still are showing up in my backup volume immediately after they are placed in my primary volume. I'm afraid that if I screw up a document I won't be able to get yesterday's copy because the backup is too current.

Am I making an incorrect assumption that the files are being backed up immediately? For instance, if I create a new movie called test.mp4, it immediately shows up in my backup volume. Either it was copied or is indexed with the intent of being copied later. Either way, I'm confused.

Thanks in advance.