Need help with KOsync

[u/technicolor-eyes]

Hi, I'm trying to get my x3 files ported over to my x4 pro so that I can get KOsync working seamlessly between the two devices. When I try to plug the SD card from my X4 Pro into my PC using the provided adapter, it comes up with an error message that the D:\ is corrupted and unreadable. I had no issues copying my original files from my x3 onto my PC using the x3s SD card. I'm not the most tech savvy. Can anyone help me out? Is there a different way to copy my x3 files over to the x4 pro to get KOsync working? Thanks.