You have a USB drive with files copied from a windows server / pc and you want to copy them onto a proxmox server –
First install ntfs-3g by running the command apt-get ntfs-3g
mkdir /usbdrive
mount -t ntfs-3g /dev/sdb1 /usbdrive
use rsync to copy the data across – rsync -a /usbdrive /todestinationpath