Tools and ideas for backup of many files

Hello everyone,

In a day or two, I am getting a motherboard with an N100 integrated CPU as a replacement to the Raspberry Pi 4 (2 GB Model). I want to run Jellyfin, the *arr stack and Immich on it. However, I have a lot of photos(for Immich) and movies(for Jellyfin) (in total about 400 GB) that I want to back up, just in case something happens. I have two 1TB drives, one will have the original files, and the second will be my boot drive and have the backup files.

How can I do that? Just copy the files? Do I need to compress them first? What tools do I need to use, and how would you do it?

Thanks in advance.

EDIT: I forgot to mention that I would prefer the backups to be local.