It is interesting to see that a decent amount of users are still looking for #Synology #DSM 5.x and 6.x installations.
Some are getting old 15+y old devices just to stay on-prem and not put their data into commercial cloud services, but with RAM and HDD prices going wild it is no wonder.
I have all the DSM installations backed up for those major versions (apart from 7.x that is still accessible).