Seagate has always produced excellent hard drives and these two portable series are no exception. These portable drives have the robust features that most desktop style external drives have, yet they can be toted with you anywhere you go. The 640GB Go drive, while only having a USB 2.0 interface, has full versions of the Seagate suite for your entire backup and sync needs. The 500GB GoFlex has multiple interfaces available for it including USB 3.0, FireWire and even powered eSATA. The drawback to the GoFlex is the software that comes standard on the Go series is only trials on the GoFlex, with the exception of the Instant Backup. I am at a loss as to why Seagate took a step back in this department.[/quote6
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