Migrate 6.3.4 on raspi to 7.0.5 on ubuntu

Hello everyone,

I’m trying to migrate my server from the version 6.3.4 on raspi to 7.0.5 on Ubuntu. I tried to install seafile on Ubuntu, then to copy the databases of ccnet, seahub and the entirety of seafile-data to the new install.
It kinda worked but I didn’t had access to the files, some accounts are there but not all, the names of the libraries are there but not the content. I’ve tried different small different way to do it but it doesn’t show any improvements.
What is the correct way to do it?

Thank you for your answer, I greatly appreciate it!