.CRDS File Extension
File TypeWindows CardSpace Backup File
This file is saved in a binary format, which requires a specific program to read its contents.
What is a CRDS file?
Backup file created by Windows CardSpace, a digital identity management application included with Windows 7; contains a backup of one or more .CRD CardSpace cards; used when restoring cards in the event they are lost or corrupted; also used for transferring cards between computers.