Biometric fingerprint readers do not store images of your fingers. When employees are enrolled, the scanned fingerprint is stored as a template, which is created using a specific algorithm. Other than biometric fingerprint devices, these templates cannot be used anywhere else.
Also, it is not possible for anyone to turn these templates back to replicate a fingerprint scan. So when it comes to privacy, you don’t have to worry about privacy as your fingerprints are not stored.