How to install a new sd card without backup?

I was transferring some files to my X4’s SD card using a USB adapter. Unfortunately, when I inserted the card into my PC, it couldn’t recognize it. When I put it back into my X4, it couldn’t recognize the card either(only some strange files).

I think the problem is with the SD card itself rather than the device. I’m going to buy a new SD card, but I don’t have a backup of the data that was on the old one.

What procedure should I follow to set up the new SD card?

(I’m using crosspoint, btw)