bitlocker is and isn't complicated for a few reasons I've run into. 1. you need some trusted-something module in your hardware. idek wtf that is...
2. files, folders, and partitions could be encrypted in the past. So why does the entire storage volume really matter? Pros/cons? who knows? some guy on ms technet who writes a biblical length dissertation that takes so long to find + read + then digest on your own, you end up caring very little.
3. user/administrator ownership/permissions/rights ARE A BITCH for the competent, non-programming syntax familiar, user. The finer-grained options in win7 have become more obfuscated with inheritance and the like.
4. This all becomes more cumbersome + confusing when working between installs/systems with the same computer/user name. It's like trying to pick the blue pill from a handful of only red ones.
++1 for truecrypt, or the like
though.... 'bitlocker-to-go' looks fairly simple; especially if this is a backup drive we're talking about. assuming because it is specialized for a removable volume, that it is easy to extend certificates/rights to another (business, like you said, maybe?) computer. Probably a request service, or just turn an old usb dongle into an usage-rights key.
walkthroughs on bitlocker and bitlocker2go:
http://www.microsoft.com/downloads/...75-BBEC-44BF-BF94-48EC4E1265AC&displaylang=en
wiki's; first on explanatory, second product-wise useful:
http://en.wikipedia.org/wiki/Full_disk_encryption
http://en.wikipedia.org/wiki/Comparison_of_disk_encryption_software
ms layman product blurbage:
http://www.microsoft.com/windows/enterprise/products/windows-7/features.aspx#bitlocker