Android Question

i was using sony xperia e8 with os v1.6 and now i bought xperia z with 4.1 version . before starting using xperiaz i took back up of messages and contacts in memory card from xperia e8. but now i could not restore the messages which i took backup from my old mobile i imported the contacts from sim card. the error message is being displayed as unsupported file system. it is in .sbf format.. i need those messages in my new phone can any one help pls.