Simple Drive Capacity: 250, 320, 500 GB Interface: USB Durability Rating: Tip-over Transfer Rate: 480 Mbps External Power Supply: Yes Fan: Yes Dimensions: 7.5" x 2.2" x 5" Weight: 4.8 oz. Price: $80 (320 GB) Web Site
The name gives away the entire concept of this drive: USB interface, plug and play, in 250-, 320-, and 500-GB capacities. The catch is that you get 2 GB of online backup storage free of charge. That's not a catch? How about unlimited online storage for about $5 per month? No, that's not a catch either. Sounds too simple.
Pro Drive Capacity: 500, 750 GB, 1 TB Interface: USB, eSATA Durability Rating: Tip-over Transfer Rate: 400 Mbps, 3 GBps External Power Supply: Yes Fan: Yes Dimensions: 10.5" x 4.0" x 9.0" Weight: 55 oz. Price: $270 (1 TB) Web Site
Add some hard drive growth hormone to the Simple Drive and end up with the Pro Drive. There are 500- and 750-GB and 1-TB versions and they're equipped with USB and eSATA interfaces. The drive also is bestowed with the Simple Drive's same 2 GB of free online storage or unlimited online capacity for about $5 per month. It was probably simpler just to keep things the same.
Somewhere in Irvine, Calif., sits a company called US Modular that boasts of having standard and custom storage solutions and providing 24/7 live tech support. We like a company willing to go to extremes.
XtremeDrive Capacity: 60, 120, 160, 250 GB Interface: USB Durability Rating: All-terrain Transfer Rate: 480 Mbps External Power Supply: No Fan: No Dimensions: 5.83" x 3.71" x 1.36" Weight: 8 oz. Price: $229 (120 GB) Web Site
The XtremeDrive is touted as an ideal solution for the military, which makes sense as it meets MIL-STD-810F and IP67 military standards. The exterior shell will protect the 2.5-inch drive during operation against the intrusion of dust, the ingress of water "in harmful quantity" at a depth of up to one meter, and up to 1.0 G of vibration. While there is limited availability of the 60-GB version, the 120-, 160-, and 250-GB drives are mainstays. The USB XtremeDrive weighs in at 8 ounces.
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