File backup to cloud services, what do you use and how?

I have my server hardware on the way over to me and in anticipation of building my first server I've been researching/looking for different topics that will allow me to achieve my intent.

I'm looking at storing several 100gb (ever increasing), I was initially going to use a Synology has but decided this was more fun and flexible. The idea was to use Back blaze B2 to upload important data (predominantly photos and lightroom catalogues + some files), I think this is still possible with the OMV, I'm not entirely sure how? TechnoDadLife has a video using Duplicati which I think I'll will get the job done.

However, as this is new to me, I'm curious, what others are using to keep their files safe in the cloud? How are you uploading, what software or methods?

Thanks
B.

Where do you backup to?

That wouldn't be enough for my photos, I have about 600gb.

I will probably save the 600gb locally and only upload the edited images, in not sure how much this is but it's easily 100gb and growing.

I'll look into it.

Raw images are 18-25mb each, it fairly adds up over time