I do something similar. Even before the current EU Energy madness, the price of storing <=10TB in the cloud was less than the cost of a dual bay NAS with 2x10T

I do something similar. Even before the current EU Energy madness, the price of storing <=10TB in the cloud was less than the cost of a dual bay NAS with 2x10TB drives plus the power required to run it[1] for 5 years. Currently the power alone costs more than the 10TB cloud storage. Considering that the cloud has way more resilience than anything i can reasonably cook up at home, the major threat in the cloud is loss of privacy and/or loss of access. Loss of privacy can be somewhat countered using Cryptomator (https://cryptomator.org/ https://cryptomator.org/) which end to end encrypts your data, and works as a regular drive backed by whatever cloud you chose. It's open source and free for desktop usage, and mobile versions costs a one time fee. Loss of access can be countered by keeping data locally, so, 4-5 years ago i moved everything to the cloud, and instead sync data locally in realtime, from where i make a local versioned backup as well as a versioned remote backup to a different cloud than my primary cloud. I do have a couple of bidirectional synchronizations going on, but the newly added "rclone bisync" (https://rclone.org/bisync/ https://rclone.org/bisync/) works wonders there. [1]: You can get around 10TB of cloud storage for €22/month. The price of a synology DS-220 2-bay NAS is around €550 (amazon.de), and a 10TB WD Red is €588 (WD Store on Amazon.de), so €1726 for the hardware. A DS-220 uses 14.96W by itself (idle), and a WD Red 10TB uses 2.8W idle, so an idle power consumption of 20.56 W, so around 180 kWh/year, and just over 900 kWh for 5 years. Assuming a €0.5/kWh electricity price, which is currently in the lower end (prices here are above €1/kWh). Adding it all up, you get €1726 + €450 = €2176, which means an average cost per month of €36 for hardware and power (over 5 years).