Anyone have a fix to the exporting issue with this app??? Also the sync lag time

Why does it keep saying storage is almost full when I try to export???? I have an iphone 13pro with 256 gb and the max icloud storage available. I have SO much space on my phone yet I cannot export any premier rush videos from my phone.

I tried to sync since this app is lame and won't let me export... yet the sync for a 3 minute video has been almost an hour now and not ever 3/4 of the way done!!! Maybe it's time to move on to another more reliable video editing app for my phone.