FIPS, or Federal Information Processing Standards, is a requirement for all encryption products used by U.S. government workers and government contractors. FIPS validations are given by the National Institute of Standards and Technologies (NIST).

As of June 2014, the DataLocker Enterprise is the only external hard drive in the market that has a FIPS 140-2 validation which covers the entire storage device. All other commercially available encrypted external hard drives utilize FIPS 140-2 validated cryptographic modules which are used within the storage. This is commonly referred to as "FIPS Validated Crypto" or "FIPS Inside". 

DataLocker Enterprise:
The DataLocker Enterprise has two validations. One for the entire device, certificate #1504 and it is also covered by certificate #1472 for the MX crypto module which this drive utilizes. 
See attachments

DataLocker DL3 FE:
The DL3 FE utilizes a FIPS 140-2 validated cryptographic processor. It is the same  MX 
crypto module which is validated per certificate #1472

Sentry FIPS:
The Sentry FIPS is FIPS 140-2 validated per certificate #1555.

SafeCrypt is FIPS 140-2 validated per certificate #819.

EncryptDisc is FIPS 140-2 Validated per 
certificate #819.