Hi, I prefer to use Android Mobile Manager tool to backup my SMS to computer. Use it, I can backup , manage and send text messages directly. Easy to backup ad restore SMS from Android
You can download a tool from Android Mobile Manager, It can transfer everything from Android to computer and supports to backup and restore your phone data with a click. How to backup and restore your SMS
You can try other methods to transfer files like Android File Transfer and Android Manager. It supports to connect phone via USB and wifi.
Easy to transfer files form phone to computer for backup and to import files into Android from PC.
Mobile Phone Transfer is a cool app that supports moveing data between smartphones easily. It can be compatible with almost all brands of Android phones, various types of iPhone, Nokia and Blackberry.
As I know you can try to use some tools like Android eraser to wipe Android phone. The data deleted by it can't be recovered. It can erase all the files including contacts, text messages, photos, videos, music, ebooks, note and so on.