How do I change the size of a TrueCrypt volume?
As a TrueCrypt volume is effectively a formatted disk drive, there is no way to directly change its size. However, a new volume can be created that is the correct size, and the contents of the “old” volume can be copied to the new one. Assume you originally created the volume TPDATA.TC at 400 MB and now you want to change it to 650 MB.