In short, if you do not want its automatic encription, quick-format the stick before using it.
Or, if you want to keep the software entact, make sure you do not activate it, do not call it up.
Note: SecureAccess is not required to use your flash drive as a storage device on Mac or PC. SecureAccess is a complimentary data encryption and password protection application.
SanDisk SecureAccess v3.0 is a fast, simple way to store and protect critical and sensitive files on SanDisk USB flash drives.
Access to your private vault is protected by a personal password, and your files are automatically encrypted - so even if you share your SanDisk® USB flash drive or it becomes lost or stolen, access to your files are safe. [bolding mine]
Edited by RolandJS, 21 December 2015 - 04:21 PM.