How can I find the files to my old SD card so I can put it on my new SD card

Solution
Well you would have to connect that old SD card to either the original device and then move the files from that old card to the device itself, upload to a cloud account, or move over to a computer via USB cord.

Then, once the files from the old card have been saved somewhere you can access them, you can remove the old SD card and insert the new one. Once inserted then you can move the files back from the device itself, the cloud account or the computer.
Well you would have to connect that old SD card to either the original device and then move the files from that old card to the device itself, upload to a cloud account, or move over to a computer via USB cord.

Then, once the files from the old card have been saved somewhere you can access them, you can remove the old SD card and insert the new one. Once inserted then you can move the files back from the device itself, the cloud account or the computer.
 
Solution