If you feel relatively savvy with computers you might try Win32 Disk Imager on SourceForge.
There are a number of disk imager programs that let you backup and restore SD (and other) cards or even create a new SD card from a complete .iso file you download on line.
Example are: BalenaEtcher, ApplePi Baker and dozens of others.
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2017 Winnebago Adventurer 37F
2016 Lincoln MKX Toad