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My Custom Built Self Hosting Server
(discuss.tchncs.de)
Hosting your own services. Preferably at home and on low-power or shared hardware.
Also check out:
What do you need so much storage for? I get the feeling people tend to massively oversize their HDD array.
Speaking for myself; backups for a family of computers. I have 4 local PCs and several remote(family) pcs doing weekly backups then all that is offloaded to an external drive array each month. It’s not like it’s critical data but it’s fun to practice.