How do I install Steam for Linux on a New Technology File System (NTFS) partition?
Commonly, drives are mounted automatically using /etc/fstab. In order to install Steam for Linux onto an NTFS partition, it must be explicitly mounted using the ntfs-3g driver. The following information lists the steps for properly modifying your /etc/fstab file:
From a command-line, determine the UUID of the drive containing the NTFS partition:
Add a line to your /etc/fstab file that mounts that drive with ntfs-3g:
UUID=yourUUID /data ntfs-3g defaults,locale=en_US.utf8 0 0
Save your changes and reboot your machine.
For more information on mounting NTFS partitions using /etc/fstab, see this article.