I have an older Synology also with 4x8 TB storage. Can these two devices with 4 hard disks each be connected via a cable so that I still only see one hard disk on the computer? Or what is the recommended procedure for a NAS that will soon be full?

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Answer

Synology NAS cannot be connected together to expand the storage size. However, there is the DX517 expansion module that can be used to expand a DS920+ or DS918+ solution so that the disks in the Dx517 can be used to expand the existing NAS.

Synology DX517 Expansion Unit

[Synology DX517 Expansion Unit](https://www.digitec.ch/de/s1/product/synology-dx517-expansion-unit-netzwerkspeicher-nas-zubehoer-6280895?supplier=406802)

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Question about Synology DS920+

I have an older Synology also with 4x8 TB storage. Can these two devices with 4 hard disks each be connected via a cable so that I still only see one hard disk on the computer? Or what is the recommended procedure for a NAS that will soon be full?