Is there an app or what is the best way to sync or ftp transfer files and text from an iphone 8 to my iPhone X or my laptop I have a 2018 Dell Inspirion it has 256 ssd 16G ram so it is able but dont know the command or the app for my phone to get...

I'm looking for a Hi-End convertible Tablet PC - the slimmest, the fastest (Core i5, i7 or better), at least 6 GB of memory (1024 MHz bus or better). The more battery lifetime the better but at least 5 - 6 hours.