Though the excitement of new internal workings on a recently-released Mac is always a crowd-pleaser, there’s something to be said about keeping things the same: namely, the security of knowing what worked before will likely continue to work. Such is the case with the 2010 Mac Pros, which—as far as upgrading goes—are pretty much identical to the 2009 models.
This continuance of design means that it remains simple to add an eSATA port to the back of your Mac Pro at a fraction of the expense of a full PCIe card. All you need is the Newer Technology eSATA Extender Cable and a Phillips screwdriver.
Just like the 2009 version, all you need to do is detach the SATA cable going to the empty optical bay and route the extender cable behind the internal fan, to the PCIe ports. We even have an instructional video that shows how easy it is.
eSATA is the fastest external hard drive connection method currently available for the Mac Pro. OWC and Newer Technology make it easy to add it yourself.