Apple

Hi everyone, so I’m about to upgrade to iPhone 15 Pro (coming from iPhone X) and I chose the 128GB version while the 256GB version was just 85€ more (different color tho); I made this decision because I found out that now you can easily connect external storage and you can find cheaper ones for more space than 256GB.

So now I need to ask, is it possible or easy to do whole iPhone backups to an external storage directly connected to the phone without going through a PC? Or I would still need to connect both the phone and external storage to a PC with the iTunes app?

Also, is it posspossible to selectively transfer only some apps files? (for example doing a whole WhatsApp backup only?)