Get Text2Store.
Free to download and try. Backing up is free forever; reading every conversation and exporting need a subscription, and one plan covers every iPhone, iPad, and computer you own. See pricing.
Updates install themselves: the Mac app updates in place, and the Store keeps Windows current. Questions to hello@text2store.com.
Next
Plug in your iPhone or iPad, tap Trust, and click Back Up & Archive. The first backup takes a while; every one after it copies only what changed. Read the two-minute guide.