What file type do you guys use for backups?

I am using lightroom cloud as of now to backup my photos online but i also got a hard drive that i want to copy all of them onto. I also want to be able to edit them later on if i feel like it. Now, the question is what is the best file type to export them as?

1. Dng—> from what i understand, quality wise it is the same as raw, but it also keeps the editing settings, and it can be altered later on. Smaller file size, and it keeps everything in one document.

2. Original + settings—> larger file size and it exports as 3 separate files— acr, arw and xmp. Is this going to matter when i want to re-edit them in the future?

I would go for dng for the simplicity of it all, but i don’t know if this is the right choice long term.