So I bought a used iPhone 11 from Best Buy and I tried to set it up from my old iPhone SE. And almost every thing transferred. I did have to log back into most of my apps but that wasn’t a big deal. So I thought everything was normal and good but now my new phone is saying it’s a temporary back up and will delete all my info on there in 18 days
[Re-Titled by Moderator]
That is referring to the backup that was made to transfer the contents of your old iPhone; it used free temporary iCloud space. As it is a backup of your old phone you no longer need it, but you should back up your new phone regularly; ideally using the Automatic Nightly Backup feature in iCloud→How to back up your iPhone, iPad, and iPod touch - Apple Support
That is referring to the backup that was made to transfer the contents of your old iPhone; it used free temporary iCloud space. As it is a backup of your old phone you no longer need it, but you should back up your new phone regularly; ideally using the Automatic Nightly Backup feature in iCloud→How to back up your iPhone, iPad, and iPod touch - Apple Support
iPhone 11 temporary backup deleting data in 18 days
