Transferring Data between old and new phone

TL;DR: Switching from A70 to Fairphone 4. What is the best way to transfer data/settings? More context: I need to transfer data between two phones: An Samsung Galaxy A70 (2019) and a Fairphone 4. Both will be running stock and Android 11. What is the best way to basically mirror or copy my old A70 to the new Fairphone 4? I used Smartswitch when previously switching but I don't know if on can switch from a Galaxy phone to a NON-Galaxy phone using Smart switch. Samsung's Websites more or less aggressively markets Smart Switch to be the way to switch to a Galaxy phone from your old potentially NON-Galaxy phone. Of course there is some marketing talk involved in there trying to promote Galaxy Phones. In this video (https://www.youtube.com/watch?v=kB3r9O2BACw) another way is showcased but I didn't see this way when switching to and from an Android phone prior. I am afraid the A70 is going to die soon and I am unsure if my Smart Switch backup on my PC will be sufficient so I am asking this question before the Fairphone 4 even arrived. Thank you for your help in advance! (and sorry if my English isn't perfect)