Other Great Backup DrivesSeagate Expansion 8-TB External Hard Drive for $159: Seagate is another reliable drive maker. It is, however, well worth the money if it's speed you're after. That puts the X9 Pro at the top of the pack in terms of portable drive speed. There is also the X10 Pro drive ($235), which offers even faster speeds if you have a PC that supports USB 2X2. Best Tiny DriveSeagate's new Ultra Compact SSD straddles the line between USB thumb drive and traditional external drive.