lxsw20:

 

There is a script so you can run alternative SSD's

https://github.com/007revad/Synology_HDD_db

As for transcoding, its not a sizing issue as much as they have moved most of their processing from Intel to AMD with no built in GPU is my understanding. 

 

Thanks, gave it a go and can now see my M.2 Drive, set up storage pool and volume :)