I've used SMS Backup & Restore for several years to do exactly what you describe.
Everything backs up to a local folder on my phone and I sync to my home server. The app can sync backups to a cloud storage, but it isn't required.
Welcome to the droidymcdroidface-iest, Lemmyest (Lemmiest), test, bestest, phoniest, pluckiest, snarkiest, and spiciest Android community on Lemmy (Do not respond)! Here you can participate in amazing discussions and events relating to all things Android.
The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:
1. All posts must be relevant to Android devices/operating system.
2. Posts cannot be illegal or NSFW material.
3. No spam, self promotion, or upvote farming. Sources engaging in these behavior will be added to the Blacklist.
4. Non-whitelisted bots will be banned.
5. Engage respectfully: Harassment, flamebaiting, bad faith engagement, or agenda posting will result in your posts being removed. Excessive violations will result in temporary or permanent ban, depending on severity.
6. Memes are not allowed to be posts, but are allowed in the comments.
7. Posts from clickbait sources are heavily discouraged. Please de-clickbait titles if it needs to be submitted.
8. Submission statements of any length composed of your own thoughts inside the post text field are mandatory for any microblog posts, and are optional but recommended for article/image/video posts.
Community Resources:
We are Android girls*,
In our Lemmy.world.
The back is plastic,
It's fantastic.
*Well, not just girls: people of all gender identities are welcomed here.
Our Partner Communities:
I've used SMS Backup & Restore for several years to do exactly what you describe.
Everything backs up to a local folder on my phone and I sync to my home server. The app can sync backups to a cloud storage, but it isn't required.
Same. This is exactly what I do. I'm on my 5th Android phone since 2009, and I still have all my call logs and SMSs going back until then, because I backup from my old phone and restore to my new phone on every upgrade.
Same, came here to suggest this one but was beaten to it.
While it isn't routine, I quite like QUIK, as it allows at least manual backup of messages to a folder you set within your phone, it can be found on F-Droid, although I'm unsure if it's within any repositories or just found within. QUIK
My apologies it isn't exactly what you're looking for.
That looks promising, much appreciated. I should also mention I also mean to back up MMS along with SMS.
Then I'm glad to be of at least partial assistance with your search. Ah, I'm not entirely sure if it does, and I can't presume so due to it including the entirety of the messages, and I unfortunately can't check, as I don't have any MMS to save.
I do however hope it does, but if not, I wish you the best of luck with your search, and that others will chime in with more effective solutions.
This can be done no matter what SMS/MMS app you use, but it is slow.
SMS Import / Export (Imports and exports SMS and MMS messages, call logs, and contacts.) https://f-droid.org/packages/com.github.tmo1.sms_ie/
Neo-Backup with special backups enabled can do that and much more. Works well with synchronization tools. Root required.