I also had problems with my PC not resuming after the sandisk ulitity put it to sleep to unfreeze the drive. I found that the only way to successfully perform a secure erase was to unplug and reconnect the drive at the BIOS boot choice screen. i.e After the bios has loaded but _ before you progress to booting off USB _.The sandisk dashboard usb utility then never sees the drive as “security frozen” so it doesn’t try to perform the buggy suspend/resume operation.
Most BIOSes have a key you can press during start up to pause and show you a choice of boot drives, press that and disconnect/reconnect power to the ssd you want to secure erase before choosing to boot off the USB drive with the secure erase utility on it.
EDIT: typos
