SSD Plus SDSSDA-240G - Machine hangs then then restarts and won't recognize the drive.

SSD (Solid State Drives) SanDisk® SSD Plus
3

My computer with Windows 10 and that same harddrive had been working fine until the Windows 10 Anniversary Update installed and then started having similar symptoms to what you describe.   See the following post for more information and what fixed it for me.

http://forums.sandisk.com/t5/SanDisk-SSD-Plus/SDSSDA240G-problems-with-LPM-on-Windows-10-anniversary-update/td-p/356477