I received a phone upgrade for the A17 5G (128GB) to replace my mom's aged A03 (32GB) phone. I can't use wifi or a transfer cable to transfer all the data from the old phone to the new one because the old phone apparently needs to make a backup of the data first before it will transfer it and there's not enough memory on the old phone to do so. I have read through various instructionals to use the cloud, backup on a computer, etc. but the issue is not picture or video storage as that is stored on the external sd card. The issue is with the installed apps themselves which take up nearly the 32GB of allotted internal storage.
I have managed to transfer some apps, call logs and contacts but can't transfer her messaging data which is around 10GB. The phone still wants me to free up another 7GB of space for the transfer but there's really nothing left to get rid of without deleting all of her messages which defeats the purpose of the data transfer in the first place. I have force stopped, cleared cache and unenabled various apps but can't find another 7GB to dump to make the transfer. My mom is still new to the mobile game and doesn't understand why she needs a new phone to begin with, even though her current phone is nearly unresponsive and slow as molasses due to having nearly full memory and being a very budget phone to begin with. Any tips to get the messaging data transferred so she can have a relatively seamless experience with switching to a new phone?