Sync problem after upgrading to ios9

Its been so long since I've been able to sync Calendars without first deleting all calendar files from the library in OSX that I cant be bothered anymore. Occasionally contacts will sync, but mostly not. I've learned to not use the calendar app on the MacBook Air any more. It also says during 'syncing' copy error to SSD. Basically Apple's lost the plot here judgi from the thousands of unanswered complaints from users all over the world. Basically, it just doesn't work if you have any serious quantities of data. Perhaps there is still a third-party app such as Markspace? But frankly, my laptop's main purpose now is only to backup my iPhone and iPad since it's now useless for personal data transfer.

wwould you use iCloud. Syncing is a breeze when set up correctly.

No.. I prefer local data storage and have little faith or trust in the security of iCloud. I'm based in Europe where we have data protection laws that make it our personal responsibility to keep 3rd party data secure. Since iCloud data is stored in the US where, apparently, any government agency can gain access by squeaking "National Security!" there are serious trust issues, as in I don't trust the integrity of my own Government, let alone the US's! The bottom line is that Apple need to fix this, and if they cannot they need to own up and acknowledge their technical problems; they are being experienced by a lot of their customers. Thanks for your kind response:-)