I have a MacBook with lots of bookmarks and notes. If I turn on iCloud all of that simply gets merged with what's already in the iCloud right? Should I be careful of some kind of dupes/overwrites? What about bookmark folders that may have the same name? As a side note, sometimes when I use Notes on my iPhone without internet, when I get to a place that has internet and iCould starts synching I get dupes of the same Notes. It's very frustrating and makes it impossible to track which Notes actually contain all the correct data. Screenshot attached. You can see all the dupes of "Notes". .