In an archive I just found a download of the Windows binary from April 4, 2012.
# sha1sum TrueCrypt\ Setup\ 7.1a.exe
7689d038c76bd1df695d295c026961e50e4a62ea TrueCrypt Setup 7.1a.exe
That matches the checksum of the same file in the the torrent.
# sha1sum TrueCrypt-7.1a.torrent
689e239a8d40e25c2bb9877581d0e2538b48e0a7 TrueCrypt-7.1a.torrent
# sha1sum TrueCrypt\ 7.1a\ Source.zip
4baa4660bf9369d6eeaeb63426768b74f77afdf2 TrueCrypt 7.1a Source.zip
# sha1sum --version
sha1sum (GNU coreutils) 8.13
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Ulrich Drepper, Scott Miller, and David Madore.
That second check matches the checksum stated in the initial audit report.
The Roku 3 supports FAT16, FAT32, NTFS and HFS+ drive formats. My guess is that your other devices only support FAT32? That would make the maximum volume size 2 TB for FAT32, IIRC. Assuming full implementation of NTFS and HFS+, your drive should work. I'd check with Roku first, though. Also, I have no trust of USB standards implementation, so I always use external power on something like hard drives, and I swap out the wall warts every 5 years or so (lost the greatest phone ever made to a bad wall wart).
To the A.C. troll below, I would say that, yes, there are additional products to accomplish the same purpose, but the Roku is best device of all those devices. Given Roku's business model of not requiring to get between content providers and viewers, and their excellent record of updating firmware for old devices, I expect that the Roku is the best value for some time to come.
Where there's a will, there's a relative.