Other World Computing is out today with an expanded line up of external FireWire-based hard drives it believes are “value done right.” This line of Neptune drives ranges in size from 80GB to 1TB, with pricing ranging from around $85 to $230.

The Nepture hard drives from OWC  feature two six-pin FireWire 400 ports for connectivity to Macs or PCs. Key hardware specifications include a 7200RPM drive mechanism, up to 32MB data buffer and data transfer rates of up to 400Mbps.

Those Mac-happy folks over at Other World Computing let word be known today about its highest capacity portable bus-powered storage device to date. It is known as the Mercury-On-the-Go 500GB and you’ll find it pricing around $360.

The OWC Mercury-On-the-Go 500GB portable storage drive does 5400 RPM and is designed to connect with Macs or PCs. This is done via its FireWire 800, FireWire 400 and USB 2.0 connections. Full retail versions of backup software are included for both platforms so you can back up your precious data.