Terra master F2-212 upgrade to F4-424

[Enquiries]

I’m upgrading my Terramaster F2-212 2 bay Nas that has a 8TB and a 4TB HDD with Plex data on them to the F4-424 pro 4 bay Nas and I’m adding a empty 16TB and 12TB HDD along with the 2 HDDs from my F2-212 with the Plex data and media on them my problem is how do I , or do I need to back up my Plex data and media so I don’t lose it when I switch to the F4-424 pro