Backing up to google server is fine. Just got a new Samsung Galaxy S II, I have been trying to sync all 20k historical as well as future events to the new phone.
Unfortunately , Google only synced current, previous 1 month, future events and previous repeating reminders e.g birthday.
All other historical events left out from the countless no of times sync i have carried out.
I did the clear data (from calendar storage), reboot. Factory reset but to no avail.
I managed to sync ALL calendar' events only once to the 1st Android phone.
Can someone help. really appreciate.