Buffalo HD-HS1.0TQ User Manual page 4

Flip the power switch on the back of the DriveStation to the ON position.
On a Windows computer, the new drive will be available in My
Computer. By default it will use the first available drive letter and will be
named HD-HSQ. With a Mac, the new drive will appear on the desktop.
Format
By default, the DriveStation is formatted with FAT32, allowing it to be
used with OS X, Windows, and Linux operating systems. If you're going
to use it with programs that generate filesizes larger than 4GB, such as
backup or video editing software, reformat the DriveStation as an NTFS
drive (Windows), a Mac OS Extended drive (Mac), or an XFS drive
(Linux).
DriveStation Setup