If you’re unaware, I like Synology NAS drives.
I use them for Docker and VMM projects due to their efficiency, convenience and ability to use Synology’s large RAID Arrays and have good backup tools available.
I also use them for Disk LUNs to mount 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.
My three drives, where expandable (I have others with unexpandable memory), are below.