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(lemmy.dbzer0.com)
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Nextcloud can do this and replace a bunch of other google services in the process.
Looking at what you said so far though I am not entirely sure if you want to go down the route of self hosting yet. Which is okay, it involves a lot of work and knowledge to do right. Something you might not want to risk your contacts for if you are still learing. There are services that provide nextcloud hosting. Personally I am using Hetzner, a Germany based hosting provider: https://www.hetzner.com/storage/storage-share
Edit:
I forgot to mention, you'll also need to do some fiddling with your phone to sync things: https://docs.nextcloud.com/server/latest/user_manual/en/groupware/sync_android.html
I’m already self hosting a media server and have been for 10+ years. have a vpn and all, but it is also accessible outside of my network (usually).
However it’s a very basic setup that I intend to redo to make it substantially more robust and somewhat automated, and I need to learn a ton of stuff to do so which will scaffold for this stuff. I keep hearing the same words, so at least I know what to look into :)
I have a decent list of self hosting software to look into for various things, I just haven’t had time to pursue it, but I’m about to have plenty of time :)