Share your experience!
Sorry,this is Sony mobile official user support forum. Not sure if there is any support in French.
Perhaps you can check with xperia care:
http://www.sonymobile.com/global-en/support/contact-us/
Perhaps we can assist you here.
You can have it here,please tell again the issue.
If you record on 4K it will heat up the phone really fast, that's normal, you could repair the phone with PCC if its getting hot w/o using it too often
Bridge (for Mac)
Alternatives on How to backup Xperias