David,

Thanks for the compliment. I think that incremental backups are being replaced rapidly with Single Instance Store (SIS) and De-duplication.

It's impossible to say how quickly your data file will grow including imports. I would have to say if you are importing everything, then it would be very fast.

Of course, I should clarify that your data file (AmazingCharts.mdf and AmazingCharts.ldf) will not grow fast at all even if you do have a lot of imported items as it contains only links to your imported items. However, if you are talking about a backup which contains your imported items, then you are going to have to choose not to back up the imported items if you plan to back up to AC.

Bert
Pediatrics
Brewer, Maine