|Your external drive:|
Interface USB 2.0
Performances 5400 rpm
Transfer Rate Up to 480 Mbps
136.60 x 80.01 x 17.60 mm
5.35" x 3.14" X .69"
EDIT - the ad got the length wrong
Height 17.6mm (0.69 in)
Width 80.01mm (3.15 in)
Length 141.29mm (5.56 in)
EDIT - it doesn't say there whether it's a SATA hard drive, but no drive maker has made a 500gb EIDE (PATA) 2.5" drive for many years. If you want to confirm it's a SATA drive, look up the model on the Seagate web site.
EDIT 2 - it doesn't say on the Seagate web site either !
It's a SATA II laptop (2.5") drive inside that
USB 2.0 Transfer Rate Up to 480 Mbps - that's in bits /sec - about 48 mbytes/sec max burst data transfer rate
If you don't have a desktop computer or a laptop computer that has an eSATA port (one can be added to most desktop computers that have a SATA controller), then you could get another USB 2.0 SATA 2.5" external enclosure.
Or you could use an adapter like the one in response 4 - no fancy case for the hard drive though.
If you DO have a eSATA port or if you can add one, you could get a combo USB 2.0 / eSATA SATA 2.5" external enclosure, or an eSATA SATA 2.5" external enclosure, which would yield you the fastest data transfer rate, for a bit more than a USB 2.0 one.