Time Machine asks about my drive after every backup

[cookieme]

Hi

I'm experiencing this same Time Machine popup after running a "backup on mount" scheduled smart update.

It is very odd because Time Machine is OFF, all the backups from the initial one were done using SmartUpdate.

Every time I reconnect the USB drive I see the Time Machine prompt if I want to use it for Time Machine now or later. I always answer NO.

I'm not entirely sure but the following file is created on the USB drive after I select not to use the drive for TM:

.com.apple.timemachine.donotpresent

I believe that when SuperDuper does the next smart update it is removing this file and that is why I get the prompt next time around. I understand that this file is not present on my Mac's drive, so it makes sense that it gets deleted, but just as Spotlight is preserved I think that SuperDuper should do the same with TimeMachine.

Please let me know if I've got it wrong.