Small tip: instead of using raw volumes for TrueCrypt, create a single partition and set it's partition type to Linux - that will stop Windows from complaining about it.
I have a USB 3 flash drive, formatted as a truecrypt volume/partition. If you connect it Windows thinks it is an unformatted drive, Diskovery will identity the brand and size correctly at that stage.
I use the drive for daily offsite backup (to take home) - as it is easy to loose I thought it adds a bit of additional security. If someone finds it, plugs it in, they might just think "OK then lets format it" :-)Weeeeell, it doesn't really add security - that's what the encryption is for

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