Thank you, that could be another way to explore

Thank you.

You mean 4 GB DDR 3 or the two Toshiba NAND?
https://www.nanya.com/en/Product/4248/NT5CC256M16ER-EK

I expect that each NAND would have an R/B pin, perhaps shared, and this pin would be pulled up to 1.8V via a resistor.

I don't know what would happen if you were to "defeat" the SDRAM.

_________________
A backup a day keeps DR away.

OK, I'll investiage each possibility and see what I can do. If I have success recovering data, I'll update this post.

Chip-off - no result. Device was encrypted with Bitlocker. Game Over.

Well,
Chip off possible in PS3110 , Its interesting to know ,If you can built a file system try UFS pro to decrypt bitlocked partitions ,If the key is somewhere they do this on the fly i just had a case of a Kingston A400 BTW .

_________________
Regards
Amarbir S Dhillon , Chandigarh Data Recovery Labs [India]
Logical,Semi Physical And Physical Data Recovery
Website-> http://www.chandigarhdatarecovery.com

So have anyone found the ROM Mode of this SSD??

The first image shows safe mode.

_________________
VEXUS Data Recovery

There are methods to recover the BitLocker key, but you must have a computer to connect the drive to and a working drive itself.