Create an M.2 NVMe SSD volume on your older Synology NAS
Synology has quietly added support for M.2 SSD volumes. This is a huge deal, as Synology previously allowed these slotted SSD drives for cache purposes only, limiting their utility. : r/synology
Synology DS720+ Review: SSD Cache enabled NAS Box for Home and SMBs
Synology DiskStation DS920+ NAS Review | Linuxlookup
Synology: Can I Store Data on NVMe SSDs? – Marius Hosting