I am trying to upgrade from Raspberry Pi 2 ("old setup") to Raspberry Pi 4 ("new setup"). I would like to just physically move SD card from Rpi 2 to Rpi 4. What is important for me is preserving whole setup from Rpi 2 (installed programs, setting, users, ssh keys etc).
Saying that, if not possible, I could migrate my operating system and settings to new SD card (but different size and vendor, though). I am using Raspbian (Raspbery Pi OS) upgraded to Buster installed on top of Berryboot. My suspicion is that source of this problem lays in Berryboot.
The situation is as follows:
Rpi 4 is working correctly on hardware level (AFAIK) - I can boot from SD card that was in my Rpi Zero. In this card I have native install of Raspbian Buster.
SD card is working correctly too (As the same card in Rpi 2 is working correctly).
Rpi 2 system has quite history in it. It has Berryboot on it (BTW: How to check which version - my google foo failed me) with Raspbian. Initial installation was "Stretch' (or even "Jessie") and then upgraded to "Buster" using process from: "https://www.raspberrypi.org/blog/buster-the-new-version-of-raspbian/"
Browsing Berryboot site I noticed two version of downloads - for Rpi 4 and for others Rpis (clue no 1)
When booting on Rpi 4 - I do not even get to Berryboot screen (clue no 2)
How can I solve issue with berry boot or migrate old system to new card?