SecureAccess 2.0 Mac v5.4.16

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.

Does this happen with all files or just a specific type of file?

Have you tried to copy the same file to your Desktop and then transfer it to the SecureAccess Vault? Does it work?