"Are you compacting your file regularly?
Have you read the thread of suggestions for successful sync? I don't adhere to all the suggestions, but I never go more than 2 days without sync-ing. If I have done a great deal of work, I may sync twice in a day.http://boards.ancestry.com/topics.software.famtreemaker/9684...
If you don't/can't/won't share specifics, we can't help.