Switching to x64 bit - Flash drive died

Hi,

my Dietpi x86 system with pi-hole died because of a sudden flash drive failure.
I think I was able to backup all relevant pi-hole files, before the drive completely died.

I saved the files on a Windows PC. As I am also switching now to x64 bit and I wonder how I can properly transfer the pi-hole files without messing up Linux permissions?

Thanks and best regards
Hyper