Buffalo HD-QLSU2R5 DriveStation Quad Manuel D'utilisation page 10

Replacing a Hard Drive
Caution
Do not use any replacement hard drive which draws more than 0.92
amps at 5 volts DC and 0.9 amps at 12 volts DC.
Replacement hard drives must have safety certification (such as MET or
UL) approved by NRTL.
The above warnings are basic safety restrictions only, and do not
constitute the full requirements for a hard disk drive to function properly
in the DriveStation.
Your product warranty may be void if you mount a non-approved
hard drive in the DriveStation. Buffalo's OP-HD series drives are
recommended.
For best results, replacement drives should be blank, with no files or
partitions on them.
The DriveStation's hard drives are not hot-swappable. Before changing
a hard drive in the DriveStation, power the unit down and then unplug its
power cord.
Ground yourself and the DriveStation before handling drives, or use a
wriststrap with the other end grounded to the DriveStation's chassis.
Replacing a drive can result in lower transfer speeds for DriveStation
depending on the performance of the replacement drive.
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