My storage setup
Since I use many different devices and want to access the same files from all of them, I run my “own cloud” at home with an Odroid-HC2 (a Raspberry 4 or similar device should work just as well). A 2 TB NAS hard disk (Seagate Ironwolf) is connected to the HC2, where all files are stored. Using Docker I have installed Nextcloud for files (documents, photos, etc.) as well as Gitea (code repositories). Encrypted incremental backups are done daily at night using restic and uploaded to Backblaze B2 Cloud Storage (they are quite cheap and now also have a European data center).