This website has the information you are seeking and a few ways to backup your files to a PC. Think it will give you an easy and quick way to learn how to do it.
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How can I backup android phone files to computer?
In China ,you could use 360 security or Tencent to backup your files to computers.You could storage your data to the cloud first and download them then.
Save or Backup iPhone text messages to Mac or PC. iPhone SMS Backup is very easy to use to use tool for printing text messages from iPhone or Saving them for legal purpose. Free to preview all messages and filter messages by contact name or contact number