In the near future I may need to start encrypting things on removable storage. It needs to work with Windows and with USB flash drives and USB hard drives.

I need something that's nearly transparent to use, and that works with automatic backup scripts using SyncToy. I'd greatly prefer to use something GPL, rather than getting caught in a Symantec upgrade Hell...

I've done some skimming of TrueCrypt, AxCrypt, and GPG including the GUI integration tools that use it, and have read that there are issues with using GPG with USB flash drives (because Windows can't see multiple partitions on them), but before committing to learning all of the details in something like this, does anyone have experience they'd care to share? Pitfalls?

Thanks a bunch.

Cheers,
Scott.