Share your experience!
So... I've got a Sony Xperia U since a so long time (2 years) and i've got windows 7. When i open PC compagnion for transfer phone's data to the computer, pc compagnion refused to function properly.
For the save, there is three step:
1-Data selected
2-Preparation (over 10 minutes in my computer)
and...
3-THE Save. When the save start, there is no problems. But at a moment, the save blocked. And 30 minutes later, PC compagnion say: "error system. Try to restart your mobile phone"
It's not understandable about Sony. I have already try to uninstall media go and pc compagnion, but nothings change. Please help me if somebody have a solution. (sorry for spelling mistake)
Ewen 
You don't need PCC to transfer data, just connect your phone to your computer
Computer > Xperia U > Internal storage/sd card > look for the folder > copy paste
If I want to change my xperia u, can i take on my new phone the last data to the old phone ? (just with a copy/past of phone's data without pc compagnion ? )
Use an app called either Xperia transfer or Xperia desktop transfer both found in the play store or if you are switching to another manufacturer then they may may have their own app for doing this