I installed on a SanDisk Ultra USB 3.0. I started the application (SanDiskSecureAccessV2_mac) from the Ultra and copied a file from my desktop into the vault - this worked as expected. But, when I tried to copy a file from my attached external drive the application repeatedly crashed.
For reference: I am running MacOS X 10.10.3 on a Late 2012 27 inch iMac with several attached Western Digital USB 3 external drives for backup.
Please advise on failure of my procedure. Thanks.