Hi, couple of month ago i had this problem, and i was able to use the windows installation in the ssd, however the issue where the ssd would randomly disconect kept happening but i got used to it. Now i want to fix it. The problem is:

1) Laptop would boot fine from the ssd, you start working and suddenly a BSOD, then it would reboot without seeing the ssd and proceed to boot from the hdd. I go to bios and there is no ssd conected. If i grab the laptop from the sides and twist it (with the lid open), then reboot, it would detect the ssd. This make me think of a solder joint o contact in the m.2 conector. BUT if i don't twist it, sometimes it boots fine, other times i connect or disconnect the charger and it has the same effect. 

2) If windows enters sleep mode or you close the lid and let windows enter sleep mode, then open it, windows would resume fine for a couple of seconds, then item 1) will happen.

The ssd is a Toshiba RC100, with the latest firmware and controller software, i'm currently trying to test it in another pc or laptop, and i had contacted toshiba customer service, still waiting an answer.

The laptop is a DELL Latitude 5480 with the latest bios and updates.

Hi thank you for your quick answer, the ssd is not shipped with the laptop, i installed it alongside the original 1TB hdd in the secondary m.2 connector where the wwan card would be installed. I'm currently looking for a pc to test the ssd, i will test it whenever i can, and another ssd to test my laptop.  i haven't been able to test the SSD, i've decided to go to a local shop to test it and i will inform you the results as soon as possible, i did run the diagnostic tool when the ssd disconnected and got no errors, only thing was the ssd not been shown in the devices section of the tool.

Thank you for sharing the results. Let me know if you were able to take the SSD to local shop and test it's functionality.
DELL-Cares