Unfortunately, if it's asked to handle anything other than a minuscule data set, the Traveler will quickly run out of room: The software performs only full backups, and it provides no automatic mechanism for deleting or overwriting older versions. When you run out of space, you can use 'Device Reset' under Options in the first dialog box to erase all of the drive's data, but at that point you'll have no backup until you create a new one.
The Traveler stores files in native format, so they aren't buried in a proprietary archive format. To restore files, you may use the Clickfree Backup software or Windows Explorer. The folder that the files are backed up to will appear in Explorer only if you have 'show hidden files and folders' selected, however, and you'll still have to dig a bit to get to it.
Impressively, Storage Appliance managed to fit a full-size USB 2.0 interface within the Traveler's credit-card-size body. To make the connector thin enough to retract within the drive body, however, the manufacturer had to omit the guides that ensure proper insertion orientation. In most cases, you'll want to insert the connector with the contacts facing up. When you've properly inserted it, a white LED will light up. Another component that requires careful handling is the ribbon cable to the USB connector: It's highly flexible, but easily deformable. Mine acquired a pronounced bend after only about 15 minutes of hanging from a USB port, though I was able to remove the bend by flexing it in the opposite direction.
The computing world is full of underpowered USB ports, and the USB bus is the Traveler's sole source of juice. If the Traveler disappears during the backup process, as it initially did on one of my desktop PCs, switch the drive to another port--preferably one on the back of the computer, since these are more likely wired directly to the motherboard.
Its slim, ultraportable design and its integrated software make the Clickfree Traveler a handy device. It's easy to use, it's convenient to carry around, and it works well for backing up critical files or limited-capacity data sets.