Upgrade the Memory in the DS725+ and DS1825+

Memory facts for the DS725+ and DS1825+

Which upgrade makes sense on the DS725+ and DS1825+

Synology's note for both models is that in a multi-module configuration all modules must be identical and share the same model number. So the supported end states are a matched pair of a listed module. On the DS725+: two D4ES04-4G for 8GB, two D4ES03-8G for 16GB, two D4ES03-16G for 32GB. On the DS1825+: two D4ES03-8G for 16GB, two D4ES03-16G for 32GB.

On the DS725+ a single volume above 108TB also needs 32GB, but its two internal bays cannot reach that size, so it matters only once an expansion unit is attached.

On the DS1825+ the 32GB configuration is a storage requirement and not only a performance choice: Synology allows a single volume above 108TB only with 32GB fitted, and its eight bays pass that with large drives.

Where the memory figures come from

Background this page does not repeat