Other World Computing (OWC) today announced two new Mercury On-The-Go Hard Drive Enclosure Kits for 2.5” SATA hard drives. Priced at US$39.99 with USB 2.0 and $54.99 with USB 2.0+eSATA interface options, OWC Mercury On-The-Go Kits let you build your own new portable hard drives or re-use your old SATA internal laptop hard drives to turn them into portable external drives that hook up to any computer via its USB 2.0 port.