Can we assume the basics like Windows Fast Start and BIOS Secure Boot were disabled prior to installation.
NTFS can be sometimes be fickle on linux.
We still dont know format of partition 1 containing your files though.
If you have Gparted (installed or on your Zorin bootable USB) use that to see if it tells you the formatting of that partition.
FYI. Another user had NTFS external drives that would not mount on ZorinOS, but after re-formatting again to NTFS and copying content back, did mount. Ref: Unable to mount HDDs - #41 by enstain
Maybe @337harvey can offer some advice.