I am asking this question because one similar to mine has been asked but it was specific to HTC rooted phone. Mine involves Samsung Galaxy S2 and S3. Similar thread for HTC rooted phones
I have an external SD card, KeisAir on my PC and Galaxy S2 and Galaxy S3. Migrating contacts is easy, I need to migrate my app settings, sms messages, calendar entries ..etc.
As a note, I have disabled syncing to my Gmail account because I don't want my huge list of useless email contacts to sync to my phone. I have a samsung dive account and google (only Internet sync is enabled)
thanks for anyone who can help