If you’re unaware, I like Synology NAS drives.
I use them for Docker and VMM projects in my lab due to their efficiency, convenience and ability to use Synology’s large RAID Arrays and have good backup tools available.
I also use them to mount Disk LUNs on physical or virtual Linux machines.
I recommend upgrading the memory to Synology NASs with Docker and Virtual Machine Manager (VMM).
I won’t write an article about which models can be upgraded to what amount officially/unofficially or which memory modules to use.
However, I recommend you read synology-nas-unofficial-memory-upgrade-guide
They keep this information current, whilst I’ll only do the necessary research for the old drives I’m keeping alive.