For contacts, you can back them up to your SIM card
For pictures, you can just copy them to your PC first then transfer to PC.
Note: Don't forget to disconnect the USB cable safely
As for messages, I'm not sure if there's an option.
Open Menu -> Settings -> Messages -> please check if there's an option to move text messages to SIM.
Hi RayLes. What kind of data are you pertaining to? If it's media files, you can transfer your files from Doro PhoneEasy 615 to PC then PC to Apple iPhone 4.