When you see the message, you can press shift+F10 to lunch a cmd.
In the cmd shell please check that:
1. If there is a X:\Windows\System32\ventoy.log file, and type its content
2. use diskpart to see the disk/partition/volume list and give a photo about it.
Beside, I don't think it's something about exFAT, you can reformat the 1st partition with NTFS and retry.
In the cmd shell please check that:
1. If there is a X:\Windows\System32\ventoy.log file, and type its content
2. use diskpart to see the disk/partition/volume list and give a photo about it.
Beside, I don't think it's something about exFAT, you can reformat the 1st partition with NTFS and retry.