Hi Mr. John85,
Thank you for reaching Microsoft Community.
Alternative ways to back up your files, either you'll use a thumb drive or an external hard drive. When you reimage your device do not use anything larger than 16GB USB stick. We don't have other way to reimage your device. Make sure to follow the instructions provided on this link Creating and using a USB recovery drive for Surface - Microsoft Support.
Feel free to response if you have further questions.
Kind regards,
Lavenia