Replica is not supported. To access previously-made Replica backups, you must connect the GoFlex with Replica drive to a Windows 7/Vista/XP computer and restore the data from the Replica backup to a folder where you can access it directly, without the use of Replica software.
To do that, find your Replica backup and copy-and-paste or drag-and-drop your data to a different folder within the external drive. See Document ID: 211271 for instructions.
For new backups, consider Windows Backup. Windows 8 has a file history backup and a system image backup built in.