The Teradata Tools and Utilities (TTU) Products can now be installed at a location provided by the user. All products of the same release (for example, 15.10, 16.20, etc.) must be installed at the same prefix.
For example, if the prefix is a drive (for example, D:), then the 32-bit products will be installed in D:\Program Files (x86)\Teradata\Client\16.20 and the 64-bit products will be installed in D:\Program Files\Teradata\Client\16.20. This follows the Windows convention. The same applies to a prefix like drive:\TTUProducts.