Default How to backup apps and system data?

This sounds like a noob question, but I am not that noob, I have been moding and doing all stuff since X10 , but this is the only thing I couldn't get my head around (I am not very expert though).

I used to use several apps, but nothing seems to be working with the new 4.4 update. I tried PCC but it always lags and never worked for me, I tried three different laptops (two of which are fairly new) but still didn't work. I tried carbon (helium) but didn't work either.

I have been using sony's old backup and restore app and it has been working fine until 4.4 comes out and it is saying that the backup isn't compatible to be restored (although I used it to backup and restore from different android version without any issues previously in the Z1 and old Xperia S).

I would like to hear suggestion on best way to backup from 4.3 to 4.4 WITHOUT root. I have a backup and can always downgrade to 4.3 and restore data then backup using any suggested app.

Thanks in advance